API: Allow to simulate check-ins

Fix isort
Add query tagging for periodic tasks
2026-07-08 05:41:56 +00:00 · 2026-07-07 19:20:19 +02:00 · 2026-07-07 15:43:00 +02:00 · 2026-07-07 14:55:32 +02:00 · 2026-07-07 12:13:40 +02:00 · 2026-07-07 12:09:27 +02:00
269 changed files with 523498 additions and 558120 deletions
@@ -10,8 +10,7 @@ tests:
        - cd src
        - python manage.py check
        - make all compress
-        - playwright install
-        - PRETIX_CONFIG_FILE=tests/ci_sqlite.cfg py.test -n 3 tests --maxfail=100
+        - PRETIX_CONFIG_FILE=tests/ci_sqlite.cfg py.test -n 3 tests --ignore=tests/e2e --maxfail=100
    except:
        - '/^v.*$/'
 pypi:
@@ -71,6 +71,8 @@ Checking a ticket in
   :>json object questions: List of questions to be answered for check-in, only set on status ``"incomplete"``.
   :>json object media_policy: Reusable media policy (see documentation on items), only set on status ``"exchange"``.
   :>json object media_type: Reusable media type (see documentation on items), only set on status ``"exchange"``.
+   :>json boolean simulate: Do not actually perform the check-in, only simulate the response. The ``position`` response
+                            object will not reflect the simulated changes.

   **Example request**:

@@ -81,7 +81,7 @@ is a python method that emulates a behavior similar to ``reverse``:

 If you need to communicate the URL externally, you can use a different method to ensure that it is always an absolute URL:

-.. autofunction:: pretix.multidomain.urlreverse.build_absolute_uri
+.. autofunction:: pretix.multidomain.urlreverse.eventreverse_absolute

 In addition, there is a template tag that works similar to ``url`` but takes an event or organizer object
 as its first argument and can be used like this::
@@ -370,14 +370,14 @@
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    },
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-      "resolved": "https://registry.npmjs.org/@napi-rs/wasm-runtime/-/wasm-runtime-1.1.4.tgz",
-      "integrity": "sha512-3NQNNgA1YSlJb/kMH1ildASP9HW7/7kYnRI2szWJaofaS1hWmbGI4H+d3+22aGzXXN9IJ+n+GiFVcGipJP18ow==",
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@napi-rs/wasm-runtime/-/wasm-runtime-1.1.5.tgz",
+      "integrity": "sha512-AWPoBRJ9tsnVhor4sjO7rkni+7p+2IAEFj6cx06UgP10jkQHqay/36uRV/bFkgrh18D9vb4cr8Q0Pthskgzy+Q==",
      "dev": true,
      "license": "MIT",
      "optional": true,
      "dependencies": {
-        "@tybys/wasm-util": "^0.10.1"
+        "@tybys/wasm-util": "^0.10.2"
      },
      "funding": {
        "type": "github",
@@ -427,9 +427,9 @@
      }
    },
    "node_modules/@oxc-project/types": {
-      "version": "0.129.0",
-      "resolved": "https://registry.npmjs.org/@oxc-project/types/-/types-0.129.0.tgz",
-      "integrity": "sha512-3oz8m3FGdr2nDXVqmFUw7jolKliC4MoyXYIG2c7gpjBnzUWQpUGIYcXYKxTdTi+N2jusvt610ckTMkxdwHkYEg==",
+      "version": "0.133.0",
+      "resolved": "https://registry.npmjs.org/@oxc-project/types/-/types-0.133.0.tgz",
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      "dev": true,
      "license": "MIT",
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@@ -758,9 +758,9 @@
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    },
    "node_modules/@rolldown/binding-android-arm64": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-android-arm64/-/binding-android-arm64-1.0.0.tgz",
-      "integrity": "sha512-TWMZnRLMe63C2Lhyicviu7ZHaU4kxa6PS3rofvc9GmcvptzNN11BcfQ4Sl7MwTOsisQoa2keB/EBdNCAnUo8vA==",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-android-arm64/-/binding-android-arm64-1.0.3.tgz",
+      "integrity": "sha512-454rs7jHngixp/NMxd5srYD57OnzSlZ/eFTETjORQHLwJG1lRtmNOJcBerZlfu4GjKqeq8aCCIQrMdHyhI51Hw==",
      "cpu": [
        "arm64"
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@@ -775,9 +775,9 @@
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    },
    "node_modules/@rolldown/binding-darwin-arm64": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-arm64/-/binding-darwin-arm64-1.0.0.tgz",
-      "integrity": "sha512-6XcD+8k0gPVItNagEw78/qqcBDwKcwDYS8V2hRmVsfUSIrd8cWe/CBvRDI5toqFyPfj+FJr6t8U6Xj2P2prEew==",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-arm64/-/binding-darwin-arm64-1.0.3.tgz",
+      "integrity": "sha512-PcAhP+ynjURNyy8SKGl5DQP94aGuB/7JrXJb/t7P+hanXvQVMWzUvRRhBAcg/lNRadBhoUPqSoP4xw5tR/KBEA==",
      "cpu": [
        "arm64"
      ],
@@ -792,9 +792,9 @@
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    },
    "node_modules/@rolldown/binding-darwin-x64": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-x64/-/binding-darwin-x64-1.0.0.tgz",
-      "integrity": "sha512-iN/tWVXRQDWvmZlKdceP1Dwug9GDpEymhb9p4xnEe6zvCg5lFmzVljl+1qR1NVx3yfGpr2Na+CuLmv5IU8uzfQ==",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-x64/-/binding-darwin-x64-1.0.3.tgz",
+      "integrity": "sha512-9YpfeUvSE2RS7wysJ81uOZkXJz7f7Q55H2Gvp3VEw/EsahqDtrphrZ0EwDLK5vvKOzaCrBsjF8JmnMLcUt78Gg==",
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@@ -809,9 +809,9 @@
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    "node_modules/@rolldown/binding-freebsd-x64": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-freebsd-x64/-/binding-freebsd-x64-1.0.0.tgz",
-      "integrity": "sha512-jjQMDvvwSOuhOwMszD/klSOjyWMM3zI64hWTj9KT5x4MxRbZAf+7vLQ6qouRhtsLVFHr3f0ILaJAfgENPiQdAQ==",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-freebsd-x64/-/binding-freebsd-x64-1.0.3.tgz",
+      "integrity": "sha512-yB1IlAsSNHncV6SCTL27/MVGR5htvQsoGxIv5KMGXALp+Ll1wYsn+x98M9MW7qa+NdSbvrrY7ANI4wLJ0n1e6g==",
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        "x64"
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@@ -826,9 +826,9 @@
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-      "integrity": "sha512-d//Dtg2x6/m3mbV64yUGNnDGNZaDGRpDLLNGerHQUVObuNaIQaaDp25yUiqGXtHEXX+NP2d0wAlmKgpYgIAJ2A==",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm-gnueabihf/-/binding-linux-arm-gnueabihf-1.0.3.tgz",
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@@ -843,13 +843,16 @@
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+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm64-gnu/-/binding-linux-arm64-gnu-1.0.3.tgz",
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      "cpu": [
        "arm64"
      ],
      "dev": true,
+      "libc": [
+        "glibc"
+      ],
      "license": "MIT",
      "optional": true,
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@@ -860,13 +863,16 @@
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+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm64-musl/-/binding-linux-arm64-musl-1.0.3.tgz",
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      "cpu": [
        "arm64"
      ],
      "dev": true,
+      "libc": [
+        "musl"
+      ],
      "license": "MIT",
      "optional": true,
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@@ -877,13 +883,16 @@
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+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-ppc64-gnu/-/binding-linux-ppc64-gnu-1.0.3.tgz",
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      "cpu": [
        "ppc64"
      ],
      "dev": true,
+      "libc": [
+        "glibc"
+      ],
      "license": "MIT",
      "optional": true,
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@@ -894,13 +903,16 @@
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+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-s390x-gnu/-/binding-linux-s390x-gnu-1.0.3.tgz",
+      "integrity": "sha512-Iq4ko0r4XsgbrF/LunNgHtAGLRRVE2kXonAXQ/MV0mC6jQpMOhW1SvtZja2EhC/kd05++bP78dsqBeIQyYJ6Yg==",
      "cpu": [
        "s390x"
      ],
      "dev": true,
+      "libc": [
+        "glibc"
+      ],
      "license": "MIT",
      "optional": true,
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@@ -911,13 +923,16 @@
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+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-x64-gnu/-/binding-linux-x64-gnu-1.0.3.tgz",
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      "cpu": [
        "x64"
      ],
      "dev": true,
+      "libc": [
+        "glibc"
+      ],
      "license": "MIT",
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@@ -928,13 +943,16 @@
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+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-x64-musl/-/binding-linux-x64-musl-1.0.3.tgz",
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      "cpu": [
        "x64"
      ],
      "dev": true,
+      "libc": [
+        "musl"
+      ],
      "license": "MIT",
      "optional": true,
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@@ -945,9 +963,9 @@
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+      "resolved": "https://registry.npmjs.org/@rolldown/binding-openharmony-arm64/-/binding-openharmony-arm64-1.0.3.tgz",
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@@ -962,9 +980,9 @@
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+      "resolved": "https://registry.npmjs.org/@rolldown/binding-wasm32-wasi/-/binding-wasm32-wasi-1.0.3.tgz",
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        "wasm32"
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@@ -981,9 +999,9 @@
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+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-win32-arm64-msvc/-/binding-win32-arm64-msvc-1.0.3.tgz",
+      "integrity": "sha512-gEdFFEN70A/jxb2svrWsN3aDL7OUtmvlOy+6fa2jxG8K0wQ1ZbdeLGnidov6Yu5/733dI5ySfzFlQ/cb0bSz1g==",
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@@ -998,9 +1016,9 @@
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@@ -3158,9 +3176,9 @@
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@@ -3334,9 +3352,9 @@
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@@ -3353,7 +3371,7 @@
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-        "nanoid": "^3.3.11",
+        "nanoid": "^3.3.12",
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@@ -3610,14 +3628,14 @@
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-        "@oxc-project/types": "=0.129.0",
-        "@rolldown/pluginutils": "1.0.0"
+        "@oxc-project/types": "=0.133.0",
+        "@rolldown/pluginutils": "^1.0.0"
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        "rolldown": "bin/cli.mjs"
@@ -3626,27 +3644,27 @@
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-        "@rolldown/binding-openharmony-arm64": "1.0.0",
-        "@rolldown/binding-wasm32-wasi": "1.0.0",
-        "@rolldown/binding-win32-arm64-msvc": "1.0.0",
-        "@rolldown/binding-win32-x64-msvc": "1.0.0"
+        "@rolldown/binding-android-arm64": "1.0.3",
+        "@rolldown/binding-darwin-arm64": "1.0.3",
+        "@rolldown/binding-darwin-x64": "1.0.3",
+        "@rolldown/binding-freebsd-x64": "1.0.3",
+        "@rolldown/binding-linux-arm-gnueabihf": "1.0.3",
+        "@rolldown/binding-linux-arm64-gnu": "1.0.3",
+        "@rolldown/binding-linux-arm64-musl": "1.0.3",
+        "@rolldown/binding-linux-ppc64-gnu": "1.0.3",
+        "@rolldown/binding-linux-s390x-gnu": "1.0.3",
+        "@rolldown/binding-linux-x64-gnu": "1.0.3",
+        "@rolldown/binding-linux-x64-musl": "1.0.3",
+        "@rolldown/binding-openharmony-arm64": "1.0.3",
+        "@rolldown/binding-wasm32-wasi": "1.0.3",
+        "@rolldown/binding-win32-arm64-msvc": "1.0.3",
+        "@rolldown/binding-win32-x64-msvc": "1.0.3"
      }
    },
    "node_modules/rolldown/node_modules/@rolldown/pluginutils": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.0.tgz",
-      "integrity": "sha512-aKs/3GSWyV0mrhNmt/96/Z3yczC3yvrzYATCiCXQebBsGyYzjNdUphRVLeJQ67ySKVXRfMxt2lm12pmXvbPFQQ==",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.1.tgz",
+      "integrity": "sha512-2j9bGt5Jh8hj+vPtgzPtl72j0yRxHAyumoo6TNfAjsLB04UtpSvPbPcDcBMxz7n+9CYB0c1GxQFxYRg2jimqGw==",
      "dev": true,
      "license": "MIT"
    },
@@ -4325,9 +4343,9 @@
      }
    },
    "node_modules/tinyglobby": {
-      "version": "0.2.16",
-      "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.16.tgz",
-      "integrity": "sha512-pn99VhoACYR8nFHhxqix+uvsbXineAasWm5ojXoN8xEwK5Kd3/TrhNn1wByuD52UxWRLy8pu+kRMniEi6Eq9Zg==",
+      "version": "0.2.17",
+      "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.17.tgz",
+      "integrity": "sha512-wXR/dYpcqKmfWpEdZjiKJOwCNFndD0DMnrW/cYjVGttEkBfVgcLFHoNrlj47mjOVic9yyNu65alsgF4NQyTa2g==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
@@ -4465,17 +4483,17 @@
      "license": "MIT"
    },
    "node_modules/vite": {
-      "version": "8.0.12",
-      "resolved": "https://registry.npmjs.org/vite/-/vite-8.0.12.tgz",
-      "integrity": "sha512-w2dDofOWv2QB09ZITZBsvKTVAlYvPR4IAmrY/v0ir9KvLs0xybR7i48wxhM1/oyBWO34wPns+bPGw5ZrZqDpZg==",
+      "version": "8.0.16",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-8.0.16.tgz",
+      "integrity": "sha512-h9bXPmJichP5fLmVQo3PyaGSDE2n3aPuomeAlVRm0JLmt4rY6zmPKd59HYI4LNW8oTK7tlTsuC7l/m7awx9Jcw==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
        "lightningcss": "^1.32.0",
        "picomatch": "^4.0.4",
-        "postcss": "^8.5.14",
-        "rolldown": "1.0.0",
-        "tinyglobby": "^0.2.16"
+        "postcss": "^8.5.15",
+        "rolldown": "1.0.3",
+        "tinyglobby": "^0.2.17"
      },
      "bin": {
        "vite": "bin/vite.js"
@@ -33,8 +33,8 @@ dependencies = [
  "bleach==6.4.*",
  "celery==5.6.*",
  "chardet==5.2.*",
-  "cryptography>=48.0.1",
-  "css-inline==0.20.*",
+  "cryptography>=49.0.0",
+  "css-inline==0.21.*",
  "defusedcsv>=3.0.0",
  "dnspython==2.*",
  "Django[argon2]==5.2.*",
@@ -53,7 +53,8 @@ dependencies = [
  "django-oauth-toolkit==2.3.*",
  "django-otp==1.7.*",
  "django-phonenumber-field==8.4.*",
-  "django-redis==6.0.*",
+  "django-querytagger==0.0.3",
+  "django-redis==7.0.*",
  "django-scopes==2.0.*",
  "django-statici18n==2.7.*",
  "djangorestframework==3.17.*",
@@ -76,7 +77,7 @@ dependencies = [
  "paypal-checkout-serversdk==1.0.*",
  "PyJWT==2.13.*",
  "phonenumberslite==9.0.*",
-  "Pillow==12.2.*",
+  "Pillow==12.3.*",
  "pretix-plugin-build",
  "protobuf==7.35.*",
  "psycopg2-binary",
@@ -91,9 +92,9 @@ dependencies = [
  "pyuca",
  "qrcode==8.2",
  "redis==7.4.*",
-  "reportlab==4.5.*",
-  "requests==2.32.*",
-  "sentry-sdk==2.62.*",
+  "reportlab==5.0.*",
+  "requests==2.34.*",
+  "sentry-sdk==2.64.*",
  "sepaxml==2.7.*",
  "stripe==7.9.*",
  "text-unidecode==1.*",
@@ -101,7 +102,7 @@ dependencies = [
  "tqdm==4.*",
  "ua-parser==1.0.*",
  "vobject==0.9.*",
-  "webauthn==2.7.*",
+  "webauthn==3.0.*",
  "zeep==4.3.*"
 ]

@@ -125,7 +126,7 @@ dev = [
  "pytest-sugar",
  "pytest-xdist==3.8.*",
  "pytest-playwright",
-  "pytest==9.0.*",
+  "pytest==9.1.*",
  "playwright",
  "responses",
 ]
@@ -6,8 +6,8 @@ localecompile:
 	./manage.py compilemessages

 localegen:
-	./manage.py makemessages --keep-pot --ignore "pretix/static/npm_dir/*" $(LNGS)
-	./manage.py makemessages --keep-pot -d djangojs --ignore "pretix/static/npm_dir/*" --ignore "pretix/helpers/*" --ignore "pretix/static/jsi18n/*" --ignore "pretix/static/jsi18n/*" --ignore "pretix/static.dist/*" --ignore "data/*" --ignore "pretix/static/rrule/*" --ignore "build/*" $(LNGS)
+	./manage.py makemessages --keep-pot --add-location file --ignore "pretix/static/npm_dir/*" $(LNGS)
+	./manage.py makemessages --keep-pot --add-location file -e js,ts,vue -d djangojs --ignore "pretix/static/npm_dir/*" --ignore "pretix/helpers/*" --ignore "pretix/static/jsi18n/*" --ignore "pretix/static/jsi18n/*" --ignore "pretix/static.dist/*" --ignore "data/*" --ignore "pretix/static/rrule/*" --ignore "build/*" $(LNGS)

 staticfiles: npminstall npmbuild jsi18n
 	./manage.py collectstatic --noinput
@@ -19,4 +19,4 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
-__version__ = "2026.6.0.dev0"
+__version__ = "2026.7.0.dev0"
@@ -118,6 +118,7 @@ ALL_LANGUAGES = [
    ('sv', _('Swedish')),
    ('es', _('Spanish')),
    ('es-419', _('Spanish (Latin America)')),
+    ('th', _('Thai')),
    ('tr', _('Turkish')),
    ('uk', _('Ukrainian')),
 ]
@@ -90,6 +90,7 @@ class CheckinRPCRedeemInputSerializer(serializers.Serializer):
    answers = serializers.JSONField(required=False, allow_null=True)
    exchange_medium_type = serializers.ChoiceField(required=False, choices=MEDIA_TYPES)
    exchange_medium_identifier = serializers.CharField(required=False)
+    simulate = serializers.BooleanField(default=False, required=False)

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
@@ -73,7 +73,7 @@ from pretix.base.settings import (
    LazyI18nStringList, validate_event_settings,
 )
 from pretix.base.signals import api_event_settings_fields
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute

 logger = logging.getLogger(__name__)

@@ -173,7 +173,7 @@ class EventSerializer(SalesChannelMigrationMixin, I18nAwareModelSerializer):
    )

    def get_event_url(self, event):
-        return build_absolute_uri(event, 'presale:event.index')
+        return eventreverse_absolute(event, 'presale:event.index')

    class Meta:
        model = Event
@@ -747,6 +747,7 @@ class EventSettingsSerializer(SettingsSerializer):
        'max_items_per_order',
        'reservation_time',
        'contact_mail',
+        'contact_url',
        'show_variations_expanded',
        'hide_sold_out',
        'meta_noindex',
@@ -76,7 +76,7 @@ from pretix.base.settings import (
 )
 from pretix.base.signals import register_ticket_outputs
 from pretix.helpers.countries import CachedCountries
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute

 logger = logging.getLogger(__name__)

@@ -757,7 +757,7 @@ class PaymentURLField(serializers.URLField):
    def to_representation(self, instance: OrderPayment):
        if instance.state != OrderPayment.PAYMENT_STATE_CREATED:
            return None
-        return build_absolute_uri(instance.order.event, 'presale:event.order.pay', kwargs={
+        return eventreverse_absolute(instance.order.event, 'presale:event.order.pay', kwargs={
            'order': instance.order.code,
            'secret': instance.order.secret,
            'payment': instance.pk,
@@ -806,7 +806,7 @@ class OrderRefundSerializer(I18nAwareModelSerializer):

 class OrderURLField(serializers.URLField):
    def to_representation(self, instance: Order):
-        return build_absolute_uri(instance.event, 'presale:event.order', kwargs={
+        return eventreverse_absolute(instance.event, 'presale:event.order', kwargs={
            'order': instance.code,
            'secret': instance.secret,
        })
@@ -27,7 +27,7 @@ from django.core.exceptions import ObjectDoesNotExist
 from django.db import transaction
 from django.db.models import Q
 from django.utils.crypto import get_random_string
-from django.utils.translation import gettext_lazy as _
+from django.utils.translation import gettext, gettext_lazy as _
 from rest_framework import serializers
 from rest_framework.exceptions import ValidationError

@@ -58,8 +58,8 @@ from pretix.helpers.permission_migration import (
    OLD_TO_NEW_EVENT_COMPAT, OLD_TO_NEW_EVENT_MIGRATION,
    OLD_TO_NEW_ORGANIZER_COMPAT, OLD_TO_NEW_ORGANIZER_MIGRATION,
 )
-from pretix.helpers.urls import build_absolute_uri as build_global_uri
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute
+from pretix.multidomain.urlreverse import eventreverse_absolute

 logger = logging.getLogger(__name__)

@@ -71,7 +71,7 @@ class OrganizerSerializer(I18nAwareModelSerializer):
    slug = serializers.CharField(read_only=True)

    def get_organizer_url(self, organizer):
-        return build_absolute_uri(organizer, 'presale:organizer.index')
+        return eventreverse_absolute(organizer, 'presale:organizer.index')

    class Meta:
        model = Organizer
@@ -492,14 +492,16 @@ class TeamInviteSerializer(serializers.ModelSerializer):
    def _send_invite(self, instance):
        mail(
            instance.email,
-            _('Account invitation'),
+            gettext('You\'ve been invited to join %(organizer)s') % {
+                'organizer': self.context['organizer'].name,
+            },
            'pretixcontrol/email/invitation.txt',
            {
                'instance': settings.PRETIX_INSTANCE_NAME,
                'user': self,
                'organizer': self.context['organizer'].name,
                'team': instance.team.name,
-                'url': build_global_uri('control:auth.invite', kwargs={
+                'url': mainreverse_absolute('control:auth.invite', kwargs={
                    'token': instance.token
                })
            },
@@ -574,6 +576,7 @@ class OrganizerSettingsSerializer(SettingsSerializer):
        'customer_accounts_require_login_for_order_access',
        'invoice_regenerate_allowed',
        'contact_mail',
+        'contact_url',
        'imprint_url',
        'organizer_info_text',
        'event_list_type',
@@ -837,6 +837,11 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
            )

            if exchange_medium_identifier:  # other fields are filled, see CheckinRPCRedeemInputSerializer.validate
+                if simulate:
+                    raise CheckInError(
+                        gettext('You cannot simulate a medium exchange.'),
+                        'error'
+                    )
                with transaction.atomic():
                    # Do exchange and check-in atomically, i.e. both succeed or both fail
                    medium = perform_media_exchange(
@@ -872,6 +877,7 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                'media_policy': e.media_policy,
                'media_type': e.media_type,
                'list': MiniCheckinListSerializer(list_by_event[op.order.event_id]).data,
+                'reason': e.code,
                'reason_explanation': e.msg,
            }, status=400)
        except CheckInError as e:
@@ -1063,6 +1069,7 @@ class CheckinRPCRedeemView(views.APIView):
            legacy_url_support=False,
            exchange_medium_type=s.validated_data.get('exchange_medium_type'),
            exchange_medium_identifier=s.validated_data.get('exchange_medium_identifier'),
+            simulate=s.validated_data.get('simulate'),
        )


@@ -36,7 +36,7 @@ from django.core.exceptions import ValidationError
 from django.utils.translation import gettext_lazy as _
 from requests import RequestException

-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute

 logger = logging.getLogger(__name__)

@@ -313,7 +313,7 @@ def _get_or_create_server_keypair(organizer):

 def generate_id_token(customer, client, auth_time, nonce, scope, expires: datetime, scope_claims=False, with_code=None, with_access_token=None):
    payload = {
-        'iss': build_absolute_uri(client.organizer, 'presale:organizer.index').rstrip('/'),
+        'iss': eventreverse_absolute(client.organizer, 'presale:organizer.index').rstrip('/'),
        'aud': client.client_id,
        'exp': int(expires.timestamp()),
        'iat': int(time.time()),
@@ -28,7 +28,7 @@ from django.utils.translation import gettext_lazy as _, pgettext_lazy

 from pretix.base.models import Checkin, InvoiceAddress, Order, Question
 from pretix.base.settings import PERSON_NAME_SCHEMES
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute


 def get_answer(op, question_identifier=None):
@@ -545,7 +545,7 @@ def get_data_fields(event, for_model=None):
                _("Order link"),
                Question.TYPE_STRING,
                None,
-                lambda order: build_absolute_uri(
+                lambda order: eventreverse_absolute(
                    event,
                    'presale:event.order', kwargs={
                        'order': order.code,
@@ -560,7 +560,7 @@ def get_data_fields(event, for_model=None):
                _("Ticket link"),
                Question.TYPE_STRING,
                None,
-                lambda op: build_absolute_uri(
+                lambda op: eventreverse_absolute(
                    event,
                    'presale:event.order.position', kwargs={
                        'order': op.order.code,
@@ -57,6 +57,8 @@ logger = logging.getLogger('pretix.base.email')

 T = TypeVar("T", bound=EmailBackend)

+_cgnat_net = ipaddress.ip_network('100.64.0.0/10')
+

 def test_custom_smtp_backend(backend: T, from_addr: str) -> None:
    try:
@@ -253,12 +255,15 @@ def create_connection(address, timeout=socket.getdefaulttimeout(),

        if not getattr(settings, "MAIL_CUSTOM_SMTP_ALLOW_PRIVATE_NETWORKS", False):
            ip_addr = ipaddress.ip_address(sa[0])
+            check_ip4 = ip_addr.ipv4_mapped if getattr(ip_addr, "ipv4_mapped", None) else ip_addr
            if ip_addr.is_multicast:
                raise socket.error(f"Request to multicast address {sa[0]} blocked")
            if ip_addr.is_loopback or ip_addr.is_link_local:
                raise socket.error(f"Request to local address {sa[0]} blocked")
            if ip_addr.is_private:
                raise socket.error(f"Request to private address {sa[0]} blocked")
+            if check_ip4 in _cgnat_net:
+                raise socket.error(f"Request to RFC 6598 address {sa[0]} blocked")

        sock = None
        try:
@@ -68,7 +68,7 @@ from ...control.forms.filter import get_all_payment_providers
 from ...helpers import GroupConcat
 from ...helpers.iter import chunked_iterable
 from ...helpers.safe_openpyxl import remove_invalid_excel_chars
-from ...multidomain.urlreverse import build_absolute_uri
+from ...multidomain.urlreverse import eventreverse_absolute
 from ..exporter import (
    ListExporter, MultiSheetListExporter, OrganizerLevelExportMixin,
 )
@@ -429,7 +429,7 @@ class OrderListExporter(MultiSheetListExporter):
            ]))

            row.append(
-                build_absolute_uri(order.event, 'presale:event.order', kwargs={
+                eventreverse_absolute(order.event, 'presale:event.order', kwargs={
                    'order': order.code,
                    'secret': order.secret,
                })
@@ -855,7 +855,7 @@ class OrderListExporter(MultiSheetListExporter):
                ]))

                row.append(
-                    build_absolute_uri(order.event, 'presale:event.order.position', kwargs={
+                    eventreverse_absolute(order.event, 'presale:event.order.position', kwargs={
                        'order': order.code,
                        'secret': op.web_secret,
                        'position': op.positionid
@@ -53,6 +53,7 @@ from django.db.models import QuerySet
 from django.forms import Select, widgets
 from django.forms.widgets import FILE_INPUT_CONTRADICTION
 from django.utils.formats import date_format
+from django.utils.functional import lazy
 from django.utils.html import escape
 from django.utils.safestring import mark_safe
 from django.utils.text import format_lazy
@@ -324,16 +325,21 @@ class WrappedPhonePrefixSelect(Select):
    initial = None

    def __init__(self, initial=None):
-        choices = [("", "---------")]
+        def _get_choices():
+            choices = [("", "---------")]
+
+            if initial:
+                for prefix, values in COUNTRY_CODE_TO_REGION_CODE.items():
+                    if all(v == REGION_CODE_FOR_NON_GEO_ENTITY for v in values):
+                        continue
+                    if initial in values:
+                        self.initial = "+%d" % prefix
+                        break
+            choices += get_phone_prefixes_sorted_and_localized()
+            return choices
+
+        choices = lazy(_get_choices, list)()

-        if initial:
-            for prefix, values in COUNTRY_CODE_TO_REGION_CODE.items():
-                if all(v == REGION_CODE_FOR_NON_GEO_ENTITY for v in values):
-                    continue
-                if initial in values:
-                    self.initial = "+%d" % prefix
-                    break
-        choices += get_phone_prefixes_sorted_and_localized()
        super().__init__(choices=choices, attrs={
            'aria-label': pgettext_lazy('phonenumber', 'International area code'),
            'autocomplete': 'tel-country-code',
@@ -1398,7 +1404,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
        elif self.validate_vat_id and vat_id_applicable:
            try:
                normalized_id = validate_vat_id(data.get('vat_id'), str(data.get('country')))
-                self.instance.vat_id_validated = True
+                self.instance.vat_id_validated = bool(normalized_id)
                self.instance.vat_id = data['vat_id'] = normalized_id
            except VATIDFinalError as e:
                if self.all_optional:
@@ -22,9 +22,7 @@
 import datetime
 import logging
 import math
-import re
 import textwrap
-import unicodedata
 from collections import defaultdict
 from decimal import Decimal
 from io import BytesIO
@@ -58,8 +56,8 @@ from pretix.base.services.currencies import SOURCE_NAMES
 from pretix.base.signals import register_invoice_renderers
 from pretix.base.templatetags.money import money_filter
 from pretix.helpers.reportlab import (
-    FontFallbackParagraph, ThumbnailingImageReader, register_ttf_font_if_new,
-    reshaper,
+    FontFallbackParagraph, PlainTextParagraph, ThumbnailingImageReader,
+    normalize_text, register_ttf_font_if_new, reshaper,
 )
 from pretix.presale.style import get_fonts

@@ -259,18 +257,8 @@ class BaseReportlabInvoiceRenderer(BaseInvoiceRenderer):
                register_ttf_font_if_new(family + ' B I', finders.find(styles['bolditalic']['truetype']))

    def _normalize(self, text):
-        # reportlab does not support unicode combination characters
-        # It's important we do this before we use ArabicReshaper
-        text = unicodedata.normalize("NFKC", text)
-
-        # reportlab does not support RTL, ligature-heavy scripts like Arabic. Therefore, we use ArabicReshaper
-        # to resolve all ligatures and python-bidi to switch RTL texts.
-        try:
-            text = "<br />".join(get_display(reshaper.reshape(l)) for l in re.split("<br ?/>", text))
-        except:
-            logger.exception('Reshaping/Bidi fixes failed on string {}'.format(repr(text)))
-
-        return text
+        # alias kept for plugin compatibility
+        return normalize_text(text)

    def _upper(self, val):
        # We uppercase labels, but not in every language
@@ -351,10 +339,15 @@ class BaseReportlabInvoiceRenderer(BaseInvoiceRenderer):
        return 'invoice.pdf', 'application/pdf', buffer.read()

    def _clean_text(self, text, tags=None):
-        return self._normalize(bleach.clean(
-            text,
-            tags=set(tags) if tags else set()
-        ).strip().replace('<br>', '<br />').replace('\n', '<br />\n'))
+        # For backwards compatibility with customer content, we need to support tags like <br> and <b> in a few text
+        # fields. Therefore, we can't use PlainTextParagraph for these, but run bleach instead to limit the allowed
+        # tags.
+        return self._normalize(
+            bleach.clean(
+                text,
+                tags=set(tags) if tags else set()
+            ).strip().replace('<br>', '<br />').replace('\n', '<br />\n')
+        )


 class PaidMarker(Flowable):
@@ -405,8 +398,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
    invoice_to_top = 52 * mm

    def _draw_invoice_to(self, canvas):
-        p = FontFallbackParagraph(self._clean_text(self.invoice.address_invoice_to),
-                                  style=self.stylesheet['Normal'])
+        p = PlainTextParagraph(self.invoice.address_invoice_to, style=self.stylesheet['Normal'])
        p.wrapOn(canvas, self.invoice_to_width, self.invoice_to_height)
        p_size = p.wrap(self.invoice_to_width, self.invoice_to_height)
        p.drawOn(canvas, self.invoice_to_left, self.pagesize[1] - p_size[1] - self.invoice_to_top)
@@ -417,8 +409,8 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
    invoice_from_top = 17 * mm

    def _draw_invoice_from(self, canvas):
-        p = FontFallbackParagraph(
-            self._clean_text(self.invoice.full_invoice_from),
+        p = PlainTextParagraph(
+            self.invoice.full_invoice_from,
            style=self.stylesheet['InvoiceFrom']
        )
        p.wrapOn(canvas, self.invoice_from_width, self.invoice_from_height)
@@ -548,13 +540,12 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
    def _draw_event(self, canvas):
        def shorten(txt):
            txt = str(txt)
-            txt = bleach.clean(txt, tags=set()).strip()
-            p = FontFallbackParagraph(self._normalize(txt.strip().replace('\n', '<br />\n')), style=self.stylesheet['Normal'])
+            p = PlainTextParagraph(txt, style=self.stylesheet['Normal'])
            p_size = p.wrap(self.event_width, self.event_height)

            while p_size[1] > 2 * self.stylesheet['Normal'].leading:
                txt = ' '.join(txt.replace('…', '').split()[:-1]) + '…'
-                p = FontFallbackParagraph(self._normalize(txt.strip().replace('\n', '<br />\n')), style=self.stylesheet['Normal'])
+                p = PlainTextParagraph(txt, style=self.stylesheet['Normal'])
                p_size = p.wrap(self.event_width, self.event_height)
            return txt

@@ -572,7 +563,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
        else:
            p_str = shorten(self.invoice.event.name)

-        p = FontFallbackParagraph(self._normalize(p_str.strip().replace('\n', '<br />\n')), style=self.stylesheet['Normal'])
+        p = PlainTextParagraph(p_str, style=self.stylesheet['Normal'])
        p.wrapOn(canvas, self.event_width, self.event_height)
        p_size = p.wrap(self.event_width, self.event_height)
        p.drawOn(canvas, self.event_left, self.pagesize[1] - self.event_top - p_size[1])
@@ -645,39 +636,37 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):

        type_info_text = self.invoice.transmission_type_instance.pdf_info_text()
        if type_info_text:
-            story.append(FontFallbackParagraph(
+            story.append(PlainTextParagraph(
                type_info_text,
                self.stylesheet['WarningBlock']
            ))

        if self.invoice.custom_field:
-            story.append(FontFallbackParagraph(
+            story.append(PlainTextParagraph(
                '{}: {}'.format(
-                    self._clean_text(str(self.invoice.event.settings.invoice_address_custom_field)),
-                    self._clean_text(self.invoice.custom_field),
+                    str(self.invoice.event.settings.invoice_address_custom_field),
+                    self.invoice.custom_field,
                ),
                self.stylesheet['Normal']
            ))

        if self.invoice.internal_reference:
-            story.append(FontFallbackParagraph(
-                self._normalize(pgettext('invoice', 'Customer reference: {reference}').format(
-                    reference=self._clean_text(self.invoice.internal_reference),
-                )),
+            story.append(PlainTextParagraph(
+                pgettext('invoice', 'Customer reference: {reference}').format(
+                    reference=self.invoice.internal_reference,
+                ),
                self.stylesheet['Normal']
            ))

        if self.invoice.invoice_to_vat_id:
-            story.append(FontFallbackParagraph(
-                self._normalize(pgettext('invoice', 'Customer VAT ID')) + ': ' +
-                self._clean_text(self.invoice.invoice_to_vat_id),
+            story.append(PlainTextParagraph(
+                pgettext('invoice', 'Customer VAT ID') + ': ' + self.invoice.invoice_to_vat_id,
                self.stylesheet['Normal']
            ))

        if self.invoice.invoice_to_beneficiary:
-            story.append(FontFallbackParagraph(
-                self._normalize(pgettext('invoice', 'Beneficiary')) + ':<br />' +
-                self._clean_text(self.invoice.invoice_to_beneficiary),
+            story.append(PlainTextParagraph(
+                pgettext('invoice', 'Beneficiary') + ':\n' + self.invoice.invoice_to_beneficiary,
                self.stylesheet['Normal']
            ))

@@ -707,11 +696,11 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):

        story = [
            NextPageTemplate('FirstPage'),
-            FontFallbackParagraph(
-                self._normalize(
+            PlainTextParagraph(
+                (
                    pgettext('invoice', 'Tax Invoice') if str(self.invoice.invoice_from_country) == 'AU'
                    else pgettext('invoice', 'Invoice')
-                ) if not self.invoice.is_cancellation else self._normalize(pgettext('invoice', 'Cancellation')),
+                ) if not self.invoice.is_cancellation else pgettext('invoice', 'Cancellation'),
                self.stylesheet['Heading1']
            ),
            Spacer(1, 5 * mm),
@@ -733,17 +722,17 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
        ]
        if has_taxes:
            tdata = [(
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Description')), self.stylesheet['Bold']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Qty')), self.stylesheet['BoldRightNoSplit']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Tax rate')), self.stylesheet['BoldRightNoSplit']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Net')), self.stylesheet['BoldRightNoSplit']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Gross')), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Description'), self.stylesheet['Bold']),
+                PlainTextParagraph(pgettext('invoice', 'Qty'), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Tax rate'), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Net'), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Gross'), self.stylesheet['BoldRightNoSplit']),
            )]
        else:
            tdata = [(
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Description')), self.stylesheet['Bold']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Qty')), self.stylesheet['BoldRightNoSplit']),
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Amount')), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Description'), self.stylesheet['Bold']),
+                PlainTextParagraph(pgettext('invoice', 'Qty'), self.stylesheet['BoldRightNoSplit']),
+                PlainTextParagraph(pgettext('invoice', 'Amount'), self.stylesheet['BoldRightNoSplit']),
            )]

        def _group_key(line):
@@ -780,8 +769,8 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
            max_height = self.stylesheet['Normal'].leading * 5
            p_style = self.stylesheet['Normal']
            for __ in range(1000):
-                p = FontFallbackParagraph(
-                    self._clean_text(curr_description, tags=['br']),
+                p = PlainTextParagraph(
+                    curr_description,
                    p_style
                )
                h = p.wrap(max_width, doc.height)[1]
@@ -862,7 +851,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                # Group together at the end of the invoice
                request_show_service_date = period_line
            elif period_line:
-                description_p_list.append(FontFallbackParagraph(
+                description_p_list.append(PlainTextParagraph(
                    period_line,
                    self.stylesheet['Fineprint']
                ))
@@ -874,7 +863,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                        net_price=money_filter(net_value, self.invoice.event.currency),
                        gross_price=money_filter(gross_value, self.invoice.event.currency),
                    )
-                    description_p_list.append(FontFallbackParagraph(
+                    description_p_list.append(PlainTextParagraph(
                        single_price_line,
                        self.stylesheet['Fineprint']
                    ))
@@ -883,11 +872,11 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                    description_p_list.pop(0),
                    str(len(lines)),
                    localize(tax_rate) + " %",
-                    FontFallbackParagraph(
+                    PlainTextParagraph(
                        money_filter(net_value * len(lines), self.invoice.event.currency).replace('\xa0', ' '),
                        self.stylesheet['NormalRight']
                    ),
-                    FontFallbackParagraph(
+                    PlainTextParagraph(
                        money_filter(gross_value * len(lines), self.invoice.event.currency).replace('\xa0', ' '),
                        self.stylesheet['NormalRight']
                    ),
@@ -904,14 +893,14 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                    single_price_line = pgettext('invoice', 'Single price: {price}').format(
                        price=money_filter(gross_value, self.invoice.event.currency),
                    )
-                    description_p_list.append(FontFallbackParagraph(
+                    description_p_list.append(PlainTextParagraph(
                        single_price_line,
                        self.stylesheet['Fineprint']
                    ))
                tdata.append((
                    description_p_list.pop(0),
                    str(len(lines)),
-                    FontFallbackParagraph(
+                    PlainTextParagraph(
                        money_filter(gross_value * len(lines), self.invoice.event.currency).replace('\xa0', ' '),
                        self.stylesheet['NormalRight']
                    ),
@@ -944,12 +933,12 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):

        if has_taxes:
            tdata.append([
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Invoice total')), self.stylesheet['Bold']), '', '', '',
+                PlainTextParagraph(pgettext('invoice', 'Invoice total'), self.stylesheet['Bold']), '', '', '',
                money_filter(total, self.invoice.event.currency)
            ])
        else:
            tdata.append([
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Invoice total')), self.stylesheet['Bold']), '',
+                PlainTextParagraph(pgettext('invoice', 'Invoice total'), self.stylesheet['Bold']), '',
                money_filter(total, self.invoice.event.currency)
            ])

@@ -958,12 +947,12 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                pending_sum = self.invoice.order.pending_sum
                if pending_sum != total:
                    tdata.append(
-                        [FontFallbackParagraph(self._normalize(pgettext('invoice', 'Received payments')), self.stylesheet['Normal'])] +
+                        [PlainTextParagraph(pgettext('invoice', 'Received payments'), self.stylesheet['Normal'])] +
                        (['', '', ''] if has_taxes else ['']) +
                        [money_filter(pending_sum - total, self.invoice.event.currency)]
                    )
                    tdata.append(
-                        [FontFallbackParagraph(self._normalize(pgettext('invoice', 'Outstanding payments')), self.stylesheet['Bold'])] +
+                        [PlainTextParagraph(pgettext('invoice', 'Outstanding payments'), self.stylesheet['Bold'])] +
                        (['', '', ''] if has_taxes else ['']) +
                        [money_filter(pending_sum, self.invoice.event.currency)]
                    )
@@ -980,12 +969,12 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                    s=Sum('amount')
                )['s'] or Decimal('0.00')
                tdata.append(
-                    [FontFallbackParagraph(self._normalize(pgettext('invoice', 'Paid by gift card')), self.stylesheet['Normal'])] +
+                    [PlainTextParagraph(pgettext('invoice', 'Paid by gift card'), self.stylesheet['Normal'])] +
                    (['', '', ''] if has_taxes else ['']) +
                    [money_filter(giftcard_sum, self.invoice.event.currency)]
                )
                tdata.append(
-                    [FontFallbackParagraph(self._normalize(pgettext('invoice', 'Remaining amount')), self.stylesheet['Bold'])] +
+                    [PlainTextParagraph(pgettext('invoice', 'Remaining amount'), self.stylesheet['Bold'])] +
                    (['', '', ''] if has_taxes else ['']) +
                    [money_filter(total - giftcard_sum, self.invoice.event.currency)]
                )
@@ -1008,14 +997,14 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
        story.append(Spacer(1, 10 * mm))

        if request_show_service_date:
-            story.append(FontFallbackParagraph(
-                self._normalize(pgettext('invoice', 'Invoice period: {daterange}').format(daterange=request_show_service_date)),
+            story.append(PlainTextParagraph(
+                pgettext('invoice', 'Invoice period: {daterange}').format(daterange=request_show_service_date),
                self.stylesheet['Normal']
            ))

        if self.invoice.payment_provider_text:
            story.append(FontFallbackParagraph(
-                self._normalize(self.invoice.payment_provider_text),
+                self._clean_text(self.invoice.payment_provider_text, tags=['br', 'b']),
                self.stylesheet['Normal']
            ))

@@ -1039,10 +1028,10 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
            ('FONTNAME', (0, 0), (-1, -1), self.font_regular),
        ]
        thead = [
-            FontFallbackParagraph(self._normalize(pgettext('invoice', 'Tax rate')), self.stylesheet['Fineprint']),
-            FontFallbackParagraph(self._normalize(pgettext('invoice', 'Net value')), self.stylesheet['FineprintRight']),
-            FontFallbackParagraph(self._normalize(pgettext('invoice', 'Gross value')), self.stylesheet['FineprintRight']),
-            FontFallbackParagraph(self._normalize(pgettext('invoice', 'Tax')), self.stylesheet['FineprintRight']),
+            PlainTextParagraph(pgettext('invoice', 'Tax rate'), self.stylesheet['Fineprint']),
+            PlainTextParagraph(pgettext('invoice', 'Net value'), self.stylesheet['FineprintRight']),
+            PlainTextParagraph(pgettext('invoice', 'Gross value'), self.stylesheet['FineprintRight']),
+            PlainTextParagraph(pgettext('invoice', 'Tax'), self.stylesheet['FineprintRight']),
            ''
        ]
        tdata = [thead]
@@ -1053,7 +1042,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                continue
            tax = taxvalue_map[idx]
            tdata.append([
-                FontFallbackParagraph(self._normalize(localize(rate) + " % " + name), self.stylesheet['Fineprint']),
+                PlainTextParagraph(localize(rate) + " % " + name, self.stylesheet['Fineprint']),
                money_filter(gross - tax, self.invoice.event.currency),
                money_filter(gross, self.invoice.event.currency),
                money_filter(tax, self.invoice.event.currency),
@@ -1072,7 +1061,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
            table.setStyle(TableStyle(tstyledata))
            story.append(Spacer(5 * mm, 5 * mm))
            story.append(KeepTogether([
-                FontFallbackParagraph(self._normalize(pgettext('invoice', 'Included taxes')), self.stylesheet['FineprintHeading']),
+                PlainTextParagraph(pgettext('invoice', 'Included taxes'), self.stylesheet['FineprintHeading']),
                table
            ]))

@@ -1089,7 +1078,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
                    net = gross - tax

                    tdata.append([
-                        FontFallbackParagraph(self._normalize(localize(rate) + " % " + name), self.stylesheet['Fineprint']),
+                        PlainTextParagraph(localize(rate) + " % " + name, self.stylesheet['Fineprint']),
                        fmt(net), fmt(gross), fmt(tax), ''
                    ])

@@ -1098,13 +1087,13 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):

                story.append(KeepTogether([
                    Spacer(1, height=2 * mm),
-                    FontFallbackParagraph(
-                        self._normalize(pgettext(
+                    PlainTextParagraph(
+                        pgettext(
                            'invoice', 'Using the conversion rate of 1:{rate} as published by the {authority} on '
                                       '{date}, this corresponds to:'
                        ).format(rate=localize(self.invoice.foreign_currency_rate),
                                 authority=SOURCE_NAMES.get(self.invoice.foreign_currency_source, "?"),
-                                 date=date_format(self.invoice.foreign_currency_rate_date, "SHORT_DATE_FORMAT"))),
+                                 date=date_format(self.invoice.foreign_currency_rate_date, "SHORT_DATE_FORMAT")),
                        self.stylesheet['Fineprint']
                    ),
                    Spacer(1, height=3 * mm),
@@ -1113,14 +1102,14 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
        elif self.invoice.foreign_currency_display and self.invoice.foreign_currency_rate:
            foreign_total = round_decimal(total * self.invoice.foreign_currency_rate)
            story.append(Spacer(1, 5 * mm))
-            story.append(FontFallbackParagraph(self._normalize(
+            story.append(PlainTextParagraph(
                pgettext(
                    'invoice', 'Using the conversion rate of 1:{rate} as published by the {authority} on '
                               '{date}, the invoice total corresponds to {total}.'
                ).format(rate=localize(self.invoice.foreign_currency_rate),
                         date=date_format(self.invoice.foreign_currency_rate_date, "SHORT_DATE_FORMAT"),
                         authority=SOURCE_NAMES.get(self.invoice.foreign_currency_source, "?"),
-                         total=fmt(foreign_total))),
+                         total=fmt(foreign_total)),
                self.stylesheet['Fineprint']
            ))

@@ -1162,11 +1151,8 @@ class Modern1Renderer(ClassicInvoiceRenderer):
    def _draw_invoice_from(self, canvas):
        if not self.invoice.address_invoice_from:
            return
-        c = [
-            self._clean_text(l)
-            for l in self.invoice.address_invoice_from.strip().split('\n')
-        ]
-        p = FontFallbackParagraph(self._normalize(' · '.join(c)), style=self.stylesheet['Sender'])
+        c = self.invoice.address_invoice_from.strip().split('\n')
+        p = PlainTextParagraph(' · '.join(c), style=self.stylesheet['Sender'])
        p.wrapOn(canvas, self.invoice_to_width, 15.7 * mm)
        p.drawOn(canvas, self.invoice_to_left, self.pagesize[1] - self.invoice_to_top + 2 * mm)
        super()._draw_invoice_from(canvas)
@@ -1225,8 +1211,8 @@ class Modern1Renderer(ClassicInvoiceRenderer):
                _draw(pgettext('invoice', 'Order code'), self.invoice.order.full_code, value_size, self.left_margin, 45 * mm, **kwargs)
            ]

-            p = FontFallbackParagraph(
-                self._normalize(date_format(self.invoice.date, "DATE_FORMAT")),
+            p = PlainTextParagraph(
+                date_format(self.invoice.date, "DATE_FORMAT"),
                style=ParagraphStyle(name=f'Normal{value_size}', fontName=self.font_regular, fontSize=value_size, leading=value_size * 1.2)
            )
            w = stringWidth(p.text, p.frags[0].fontName, p.frags[0].fontSize)
@@ -1283,7 +1269,7 @@ class Modern1SimplifiedRenderer(Modern1Renderer):
        i = []

        if not self.invoice.event.has_subevents and self.invoice.event.settings.show_dates_on_frontpage:
-            i.append(FontFallbackParagraph(
+            i.append(PlainTextParagraph(
                pgettext('invoice', 'Event date: {date_range}').format(
                    date_range=self.invoice.event.get_date_range_display(),
                ),
@@ -0,0 +1,29 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
+from django.core.management.base import BaseCommand
+
+
+class Command(BaseCommand):
+    help = "Do nothing. Useful for startup performance testing."
+
+    def handle(self, *args, **options):
+        pass
@@ -40,6 +40,7 @@ from django.core.cache import cache
 from django.core.management.base import BaseCommand
 from django.db import close_old_connections
 from django.dispatch.dispatcher import NO_RECEIVERS
+from django_querytagger.tagging import with_tag

 from pretix.helpers.periodic import SKIPPED

@@ -82,7 +83,8 @@ class Command(BaseCommand):
            try:
                # Check if the DB connection is still good, it might be closed if the previous task took too long.
                close_old_connections()
-                r = receiver(signal=periodic_task, sender=self)
+                with with_tag(f"periodictask={name}"):
+                    r = receiver(signal=periodic_task, sender=self)
            except Exception as err:
                if isinstance(err, KeyboardInterrupt):
                    raise err
@@ -282,10 +282,12 @@ def metric_values():

    # Throwaway metrics
    exact_tables = [
-        Order, OrderPosition, Invoice, Event, Organizer
+        Order, Invoice, Event, Organizer
    ]
    for m in apps.get_models():  # Count all models
-        if any(issubclass(m, p) for p in exact_tables):
+        if issubclass(m, OrderPosition):
+            metrics['pretix_model_instances']['{model="%s"}' % m._meta] = m.all.count()
+        elif any(issubclass(m, p) for p in exact_tables):
            metrics['pretix_model_instances']['{model="%s"}' % m._meta] = m.objects.count()
        else:
            metrics['pretix_model_instances']['{model="%s"}' % m._meta] = estimate_count_fast(m)
@@ -19,6 +19,8 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
+import logging
+import re
 from collections import OrderedDict
 from urllib.parse import urlparse, urlsplit
 from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
@@ -43,6 +45,8 @@ from pretix.multidomain.urlreverse import (
 )
 from pretix.presale.style import get_fonts

+logger = logging.getLogger(__name__)
+
 _supported = None


@@ -74,6 +78,7 @@ class LocaleMiddleware(MiddlewareMixin):

    def process_request(self, request: HttpRequest):
        language = get_language_from_request(request)
+        region = None
        # Normally, this middleware runs *before* the event is set. However, on event frontend pages it
        # might be run a second time by pretix.presale.EventMiddleware and in this case the event is already
        # set and can be taken into account for the decision.
@@ -94,15 +99,16 @@ class LocaleMiddleware(MiddlewareMixin):
                if '-' not in language and settings_holder.settings.region:
                    language += '-' + settings_holder.settings.region
                if settings_holder.settings.region:
-                    set_region(settings_holder.settings.region)
+                    region = settings_holder.settings.region
        else:
            gs = global_settings_object(request)
            if '-' not in language and gs.settings.region:
                language += '-' + gs.settings.region
            if gs.settings.region:
-                set_region(gs.settings.region)
+                region = gs.settings.region

        translation.activate(language)
+        set_region(region)
        request.LANGUAGE_CODE = get_language_without_region()

        tzname = None
@@ -221,7 +227,26 @@ def _parse_csp(header):
    return h


+VALID_CSP_DIRECTIVES = [
+    "child-src", "connect-src", "default-src", "fenced-frame-src", "font-src", "form-action", "frame-src", "img-src",
+    "manifest-src", "media-src", "object-src", "prefetch-src", "report-uri", "script-src", "script-src-elem",
+    "script-src-attr", "style-src", "style-src-elem", "style-src-attr", "worker-src",
+]
+
+CSP_ILLEGAL_CHARS = re.compile(r'[\s,;]')
+
+
+def _sanitize_csp(h):
+    for k, v in h.items():
+        if k not in VALID_CSP_DIRECTIVES:
+            raise ValueError("Invalid CSP directive " + k)
+        if any(CSP_ILLEGAL_CHARS.search(el) for el in v):
+            logger.warning("Stripping invalid component from CSP: %r", h)
+            h[k] = [el for el in v if not CSP_ILLEGAL_CHARS.search(el)]
+
+
 def _render_csp(h):
+    _sanitize_csp(h)
    return "; ".join(k + ' ' + ' '.join(v) for k, v in h.items() if v)


@@ -241,21 +266,7 @@ def _merge_csp(a, b):


 class SecurityMiddleware(MiddlewareMixin):
-    CSP_EXEMPT = (
-        '/api/v1/docs/',
-    )
-
    def process_response(self, request, resp):
-        def nested_dict_values(d):
-            for v in d.values():
-                if isinstance(v, dict):
-                    yield from nested_dict_values(v)
-                else:
-                    if isinstance(v, str):
-                        yield v
-
-        url = resolve(request.path_info)
-
        if settings.DEBUG and resp.status_code >= 400:
            # Don't use CSP on debug error page as it breaks of Django's fancy error
            # pages
@@ -266,18 +277,15 @@ class SecurityMiddleware(MiddlewareMixin):
        # https://github.com/pretix/pretix/issues/765
        resp['P3P'] = 'CP=\"ALL DSP COR CUR ADM TAI OUR IND COM NAV INT\"'

-        img_src = []
-        gs = global_settings_object(request)
-        if gs.settings.leaflet_tiles:
-            img_src.append(gs.settings.leaflet_tiles[:gs.settings.leaflet_tiles.index("/", 10)].replace("{s}", "*"))
+        if not getattr(resp, '_csp_ignore', False):
+            resp['Content-Security-Policy'] = _render_csp(self._build_csp(request, resp))
+        elif 'Content-Security-Policy' in resp:
+            del resp['Content-Security-Policy']

-        font_src = set()
-        if hasattr(request, 'event'):
-            for font in get_fonts(request.event, pdf_support_required=False).values():
-                for path in list(nested_dict_values(font)):
-                    font_location = urlparse(path)
-                    if font_location.scheme and font_location.netloc:
-                        font_src.add('{}://{}'.format(font_location.scheme, font_location.netloc))
+        return resp
+
+    def _build_csp(self, request, resp):
+        url = resolve(request.path_info)

        h = {
            'default-src': ["{static}"],
@@ -286,8 +294,8 @@ class SecurityMiddleware(MiddlewareMixin):
            'frame-src': ['{static}'],
            'style-src': ["{static}", "{media}"],
            'connect-src': ["{dynamic}", "{media}"],
-            'img-src': ["{static}", "{media}", "data:"] + img_src,
-            'font-src': ["{static}"] + list(font_src),
+            'img-src': ["{static}", "{media}", "data:"],
+            'font-src': ["{static}"],
            'media-src': ["{static}", "data:"],
            # form-action is not only used to match on form actions, but also on URLs
            # form-actions redirect to. In the context of e.g. payment providers or
@@ -296,6 +304,13 @@ class SecurityMiddleware(MiddlewareMixin):
            'form-action': ["{dynamic}", "https:"] + (['http:'] if settings.SITE_URL.startswith('http://') else []),
        }

+        gs = global_settings_object(request)
+        if gs.settings.leaflet_tiles:
+            h['img-src'].append(gs.settings.leaflet_tiles[:gs.settings.leaflet_tiles.index("/", 10)].replace("{s}", "*"))
+
+        if hasattr(request, 'event'):
+            h['font-src'] += list(self._get_font_origins(request.event))
+
        if settings.VITE_DEV_MODE:
            h['script-src'] += ["http://localhost:5173", "ws://localhost:5173"]
            h['style-src'] += ["'unsafe-inline'"]
@@ -307,6 +322,7 @@ class SecurityMiddleware(MiddlewareMixin):
            if not settings.VITE_DEV_MODE:
                # can't have 'unsafe-inline' and nonce at the same time
                h['style-src'].append(nonce)
+
        # Only include pay.google.com for wallet detection purposes on the Payment selection page
        if (
                url.url_name == "event.order.pay.change" or
@@ -315,27 +331,32 @@ class SecurityMiddleware(MiddlewareMixin):
            h['script-src'].append('https://pay.google.com')
            h['frame-src'].append('https://pay.google.com')
            h['connect-src'].append('https://google.com/pay')
+
        if settings.LOG_CSP:
            h['report-uri'] = ["/csp_report/"]
+
        if 'Content-Security-Policy' in resp:
            _merge_csp(h, _parse_csp(resp['Content-Security-Policy']))
+
        if settings.CSP_ADDITIONAL_HEADER:
            _merge_csp(h, _parse_csp(settings.CSP_ADDITIONAL_HEADER))

-        staticdomain = "'self'"
-        dynamicdomain = "'self'"
-        mediadomain = "'self'"
+        placeholders = {
+            "{static}": ["'self'"],
+            "{dynamic}": ["'self'"],
+            "{media}": ["'self'"],
+        }
        if settings.MEDIA_URL.startswith('http'):
-            mediadomain += " " + settings.MEDIA_URL[:settings.MEDIA_URL.find('/', 9)]
+            placeholders["{media}"].append(settings.MEDIA_URL[:settings.MEDIA_URL.find('/', 9)])
        if settings.STATIC_URL.startswith('http'):
-            staticdomain += " " + settings.STATIC_URL[:settings.STATIC_URL.find('/', 9)]
+            placeholders["{static}"].append(settings.STATIC_URL[:settings.STATIC_URL.find('/', 9)])
        if settings.SITE_URL.startswith('http'):
            if settings.SITE_URL.find('/', 9) > 0:
-                staticdomain += " " + settings.SITE_URL[:settings.SITE_URL.find('/', 9)]
-                dynamicdomain += " " + settings.SITE_URL[:settings.SITE_URL.find('/', 9)]
+                placeholders["{static}"].append(settings.SITE_URL[:settings.SITE_URL.find('/', 9)])
+                placeholders["{dynamic}"].append(settings.SITE_URL[:settings.SITE_URL.find('/', 9)])
            else:
-                staticdomain += " " + settings.SITE_URL
-                dynamicdomain += " " + settings.SITE_URL
+                placeholders["{static}"].append(settings.SITE_URL)
+                placeholders["{dynamic}"].append(settings.SITE_URL)

        if hasattr(request, 'organizer') and request.organizer:
            if hasattr(request, 'event') and request.event:
@@ -346,18 +367,29 @@ class SecurityMiddleware(MiddlewareMixin):
                siteurlsplit = urlsplit(settings.SITE_URL)
                if siteurlsplit.port and siteurlsplit.port not in (80, 443):
                    domain = '%s:%d' % (domain, siteurlsplit.port)
-                dynamicdomain += " " + domain
+                placeholders["{dynamic}"].append(domain)

-        if request.path not in self.CSP_EXEMPT and not getattr(resp, '_csp_ignore', False):
-            resp['Content-Security-Policy'] = _render_csp(h).format(static=staticdomain, dynamic=dynamicdomain,
-                                                                    media=mediadomain)
-            for k, v in h.items():
-                h[k] = sorted(set(' '.join(v).format(static=staticdomain, dynamic=dynamicdomain, media=mediadomain).split(' ')))
-            resp['Content-Security-Policy'] = _render_csp(h)
-        elif 'Content-Security-Policy' in resp:
-            del resp['Content-Security-Policy']
+        for k, v in h.items():
+            h[k] = sorted(set(result for part in v for result in placeholders.get(part, [part])))

-        return resp
+        return h
+
+    def _get_font_origins(self, event):
+        def nested_dict_values(d):
+            for v in d.values():
+                if isinstance(v, dict):
+                    yield from nested_dict_values(v)
+                else:
+                    if isinstance(v, str):
+                        yield v
+
+        font_src = set()
+        for font in get_fonts(event, pdf_support_required=False).values():
+            for path in list(nested_dict_values(font)):
+                font_location = urlparse(path)
+                if font_location.scheme and font_location.netloc:
+                    font_src.add('{}://{}'.format(font_location.scheme, font_location.netloc))
+        return font_src


 class RejectInvalidInputMiddleware(MiddlewareMixin):
@@ -57,7 +57,7 @@ from django_otp.models import Device
 from django_scopes import scopes_disabled

 from pretix.base.i18n import language
-from pretix.helpers.urls import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute

 from ...helpers.countries import FastCountryField
 from ...helpers.u2f import pub_key_from_der, websafe_decode
@@ -373,12 +373,12 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):

        mail(
            email or self.email,
-            _('Account information changed'),
+            _('Changes to your account'),
            'pretixcontrol/email/security_notice.txt',
            {
                'user': self,
                'messages': msg,
-                'url': build_absolute_uri('control:user.settings'),
+                'url': mainreverse_absolute('control:user.settings'),
                'instance': settings.PRETIX_INSTANCE_NAME,
            },
            event=None,
@@ -400,12 +400,13 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):

        with language(self.locale):
            if reason == 'email_change':
-                msg = str(_('to confirm changing your email address from {old_email}\nto {new_email}, use the following code:').format(
+                msg = str(_('To change your email address from {old_email} to {new_email}, use the following code:').format(
                    old_email=self.email, new_email=email,
                ))
            elif reason == 'email_verify':
-                msg = str(_('to confirm that your email address {email} belongs to your pretix account, use the following code:').format(
+                msg = str(_('To verify your email address {email} on {instance}, use the following code:').format(
                    email=self.email,
+                    instance=settings.PRETIX_INSTANCE_NAME,
                ))
            else:
                raise Exception('Invalid confirmation code reason')
@@ -418,7 +419,7 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
        }
        mail(
            email or self.email,
-            _('pretix confirmation code'),
+            _('Your confirmation code'),
            'pretixcontrol/email/confirmation_code.txt',
            {
                'user': self,
@@ -462,11 +463,13 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
        from pretix.base.services.mail import mail

        mail(
-            self.email, _('Password recovery'), 'pretixcontrol/email/forgot.txt',
+            self.email,
+            _('Reset your password'),
+            'pretixcontrol/email/forgot.txt',
            {
                'instance': settings.PRETIX_INSTANCE_NAME,
                'user': self,
-                'url': (build_absolute_uri('control:auth.forgot.recover')
+                'url': (mainreverse_absolute('control:auth.forgot.recover')
                        + '?id=%d&token=%s' % (self.id, default_token_generator.make_token(self)))
            },
            None, locale=self.locale, user=self
@@ -647,25 +650,22 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
            id__in=self.teams.filter(TeamQuerySet.organizer_permission_q(permission)).values_list('organizer', flat=True)
        )

-    def has_active_staff_session(self, session_key=None):
+    def has_active_staff_session(self, session_key):
        """
        Returns whether or not a user has an active staff session (formerly known as superuser session)
        with the given session key.
        """
        return self.get_active_staff_session(session_key) is not None

-    def get_active_staff_session(self, session_key=None):
-        if not self.is_staff:
+    def get_active_staff_session(self, session_key):
+        if not self.is_staff or not session_key:
            return None
        if not hasattr(self, '_staff_session_cache'):
            self._staff_session_cache = {}
        if session_key not in self._staff_session_cache:
-            qs = StaffSession.objects.filter(
-                user=self, date_end__isnull=True
-            )
-            if session_key:
-                qs = qs.filter(session_key=session_key)
-            sess = qs.first()
+            sess = StaffSession.objects.filter(
+                user=self, date_end__isnull=True, session_key=session_key
+            ).first()
            if sess:
                if sess.date_start < now() - timedelta(seconds=settings.PRETIX_SESSION_TIMEOUT_ABSOLUTE):
                    sess.date_end = now()
@@ -167,7 +167,7 @@ class Customer(LoggedModel):

    def send_security_notice(self, message, email=None):
        from pretix.base.services.mail import SendMailException, mail
-        from pretix.multidomain.urlreverse import build_absolute_uri
+        from pretix.multidomain.urlreverse import eventreverse_absolute

        try:
            with language(self.locale):
@@ -178,7 +178,7 @@ class Customer(LoggedModel):
                    {
                        **self.get_email_context(),
                        'message': str(message),
-                        'url': build_absolute_uri(self.organizer, 'presale:organizer.customer.index')
+                        'url': eventreverse_absolute(self.organizer, 'presale:organizer.customer.index')
                    },
                    customer=self,
                    organizer=self.organizer,
@@ -299,12 +299,12 @@ class Customer(LoggedModel):

    def send_activation_mail(self):
        from pretix.base.services.mail import mail
-        from pretix.multidomain.urlreverse import build_absolute_uri
+        from pretix.multidomain.urlreverse import eventreverse_absolute
        from pretix.presale.forms.customer import TokenGenerator

        ctx = self.get_email_context()
        token = TokenGenerator().make_token(self)
-        ctx['url'] = build_absolute_uri(
+        ctx['url'] = eventreverse_absolute(
            self.organizer,
            'presale:organizer.customer.activate'
        ) + '?id=' + self.identifier + '&token=' + token
@@ -395,7 +395,7 @@ class AttendeeProfile(models.Model):
            self.company,
            self.street,
            (self.zipcode or '') + ' ' + (self.city or '') + ' ' + (self.state_for_address or ''),
-            self.country.name,
+            self.country.name if self.country else None,
        ]
        for a in self.answers:
            value = a.get('value')
@@ -40,6 +40,7 @@ import warnings
 from collections import Counter, OrderedDict, defaultdict
 from datetime import datetime, time, timedelta
 from operator import attrgetter
+from typing import TYPE_CHECKING
 from urllib.parse import urljoin
 from zoneinfo import ZoneInfo

@@ -79,10 +80,16 @@ from pretix.helpers.thumb import get_thumbnail
 from ..settings import settings_hierarkey
 from .organizer import Organizer, Team

+if TYPE_CHECKING:
+    from hierarkey.proxy import HierarkeyProxy
+
 logger = logging.getLogger(__name__)


 class EventMixin:
+    if TYPE_CHECKING:
+        settings: HierarkeyProxy
+
    def clean(self):
        if self.presale_start and self.presale_end and self.presale_start > self.presale_end:
            raise ValidationError({'presale_end': _('The end of the presale period has to be later than its start.')})
@@ -724,7 +731,7 @@ class Event(EventMixin, LoggedModel):

    @property
    def social_image(self):
-        from pretix.multidomain.urlreverse import build_absolute_uri
+        from pretix.multidomain.urlreverse import eventreverse_absolute

        img = None
        logo_file = self.settings.get('logo_image', as_type=str, default='')[7:]
@@ -742,7 +749,7 @@ class Event(EventMixin, LoggedModel):
                logger.exception(f'Failed to create thumbnail of {logo_file}')
                img = default_storage.url(logo_file)
        if img:
-            return urljoin(build_absolute_uri(self, 'presale:event.index'), img)
+            return urljoin(eventreverse_absolute(self, 'presale:event.index'), img)

    def _seats(self, ignore_voucher=None):
        from .seating import Seat
@@ -883,6 +890,8 @@ class Event(EventMixin, LoggedModel):
            ItemProgramTime, ItemVariationMetaValue, Question, Quota,
        )

+        is_cross_organizer = other.organizer_id != self.organizer_id
+
        #  Note: avoid self.set_active_plugins(), it causes trouble e.g. for the badges plugin.
        #  Plugins can create data in installed() hook based on existing data of the event.
        #  Calling set_active_plugins() results in defaults being created while actually data
@@ -897,7 +906,7 @@ class Event(EventMixin, LoggedModel):
        self.save()
        self.log_action('pretix.object.cloned', data={'source': other.slug, 'source_id': other.pk})

-        if hasattr(other, 'alternative_domain_assignment'):
+        if hasattr(other, 'alternative_domain_assignment') and not is_cross_organizer:
            other.alternative_domain_assignment.domain.event_assignments.create(event=self)

        if not self.all_sales_channels:
@@ -911,6 +920,15 @@ class Event(EventMixin, LoggedModel):
            for emv in EventMetaValue.objects.filter(event=other):
                emv.pk = None
                emv.event = self
+                if is_cross_organizer:
+                    try:
+                        emv.property = self.organizer.meta_properties.get(name=emv.property.name)
+                    except EventMetaProperty.DoesNotExist:
+                        meta_prop = emv.property
+                        meta_prop.pk = None
+                        meta_prop.organizer = self.organizer
+                        meta_prop.save(force_insert=True)
+                        emv.property = meta_prop
                emv.save(force_insert=True)

        for fl in EventFooterLink.objects.filter(event=other):
@@ -964,13 +982,13 @@ class Event(EventMixin, LoggedModel):
            if i.tax_rule_id:
                i.tax_rule = tax_map[i.tax_rule_id]

-            if i.grant_membership_type and other.organizer_id != self.organizer_id:
+            if i.grant_membership_type and is_cross_organizer:
                i.grant_membership_type = None

            i.save()  # no force_insert since i.picture.save could have already inserted
            i.log_action('pretix.object.cloned')

-            if require_membership_types and other.organizer_id == self.organizer_id:
+            if require_membership_types and not is_cross_organizer:
                i.require_membership_types.set(require_membership_types)

            if not i.all_sales_channels:
@@ -985,7 +1003,7 @@ class Event(EventMixin, LoggedModel):
                v._prefetched_objects_cache = {}
                v.save(force_insert=True)

-                if require_membership_types and other.organizer_id == self.organizer_id:
+                if require_membership_types and not is_cross_organizer:
                    v.require_membership_types.set(require_membership_types)
                if not v.all_sales_channels:
                    v.limit_sales_channels.set(self.organizer.sales_channels.filter(identifier__in=[s.identifier for s in limit_sales_channels]))
@@ -1869,6 +1887,8 @@ class EventMetaValue(LoggedModel):
            self.event.cache.clear()

    def save(self, *args, **kwargs):
+        if self.event and self.event.organizer != self.property.organizer:
+            raise ValidationError(_("Property and event must belong to the same organizer."))
        super().save(*args, **kwargs)
        if self.event:
            self.event.cache.clear()
@@ -354,38 +354,60 @@ class Order(LockModel, LoggedModel):
    def _transaction_key_reset(self):
        self.__initial_status_paid_or_pending = self.status in (Order.STATUS_PENDING, Order.STATUS_PAID) and not self.require_approval

-    def gracefully_delete(self, user=None, auth=None):
-        from . import GiftCard, GiftCardTransaction, Membership, Voucher
-
-        if not self.testmode:
-            raise TypeError("Only test mode orders can be deleted.")
-        self.log_action(
-            'pretix.event.order.deleted', user=user, auth=auth,
-            data={
-                'code': self.code,
-            }
+    @classmethod
+    def gracefully_delete_bulk(cls, event, orders, user=None, auth=None):
+        # Expects to be called in a transaction
+        from . import (
+            GiftCard, GiftCardTransaction, LogEntry, Membership, Voucher,
        )

-        order_gracefully_delete.send(self.event, order=self)
+        if not transaction.get_connection().in_atomic_block:
+            raise Exception('gracefully_delete_bulk should only be called in atomic transaction!')

-        if self.status != Order.STATUS_CANCELED:
-            for position in self.positions.all():
-                if position.voucher:
-                    Voucher.objects.filter(pk=position.voucher.pk).update(redeemed=Greatest(0, F('redeemed') - 1))
+        logs_create = []
+        for o in orders:
+            if not o.testmode:
+                raise TypeError("Only test mode orders can be deleted.")
+            order_gracefully_delete.send(event, order=o)
+            logs_create.append(o.log_action(
+                'pretix.event.order.deleted', user=user, auth=auth,
+                data={
+                    'code': o.code,
+                },
+                save=False,
+            ))
+        LogEntry.bulk_create_and_postprocess(logs_create)

-        GiftCardTransaction.objects.filter(payment__in=self.payments.all()).update(payment=None)
-        GiftCardTransaction.objects.filter(refund__in=self.refunds.all()).update(refund=None)
-        GiftCardTransaction.objects.filter(order=self).update(order=None)
-        GiftCard.objects.filter(issued_in__in=self.positions.all()).update(issued_in=None)
-        Membership.objects.filter(granted_in__order=self, testmode=True).update(granted_in=None)
-        OrderPosition.all.filter(order=self, addon_to__isnull=False).delete()
-        OrderPosition.all.filter(order=self).delete()
-        OrderFee.all.filter(order=self).delete()
-        Transaction.objects.filter(order=self).delete()
-        self.refunds.all().delete()
-        self.payments.all().delete()
-        self.event.cache.delete('complain_testmode_orders')
-        self.delete()
+        voucher_ids = OrderPosition.objects.filter(
+            order__in=orders,
+            voucher__isnull=False
+        ).exclude(order__status=Order.STATUS_CANCELED).values_list("voucher_id", flat=True)
+        voucher_usages = Counter(voucher_ids)
+        for v_id, usage_count in voucher_usages.items():
+            Voucher.objects.filter(pk=v_id).update(redeemed=Greatest(0, F('redeemed') - usage_count))
+
+        GiftCardTransaction.objects.filter(payment__order__in=orders).update(payment=None)
+        GiftCardTransaction.objects.filter(refund__order__in=orders).update(refund=None)
+        GiftCardTransaction.objects.filter(order__in=orders).update(order=None)
+        GiftCard.objects.filter(issued_in__order__in=orders).update(issued_in=None)
+        Membership.objects.filter(granted_in__order__in=orders, testmode=True).update(granted_in=None)
+        OrderPosition.all.filter(order__in=orders, addon_to__isnull=False).delete()
+        OrderPosition.all.filter(order__in=orders).delete()
+        OrderFee.all.filter(order__in=orders).delete()
+        Transaction.objects.filter(order__in=orders).delete()
+        OrderRefund.objects.filter(order__in=orders).delete()
+        OrderPayment.objects.filter(order__in=orders).delete()
+        if isinstance(orders, models.QuerySet):
+            orders.delete()
+        else:
+            Order.objects.filter(pk__in=[o.pk for o in orders]).delete()
+        event.cache.delete('complain_testmode_orders')
+
+    def gracefully_delete(self, user=None, auth=None):
+        if not self.testmode:
+            raise TypeError("Only test mode orders can be deleted.")
+
+        Order.gracefully_delete_bulk(self.event, Order.objects.filter(pk=self.pk), user, auth)

    def email_confirm_secret(self):
        return self.tagged_secret("email_confirm", 9)
@@ -1675,7 +1697,7 @@ class AbstractPosition(RoundingCorrectionMixin, models.Model):
            self.company,
            self.street,
            (self.zipcode or '') + ' ' + (self.city or '') + ' ' + (self.state_for_address or ''),
-            self.country.name
+            self.country.name if self.country else ''
        ]
        lines = [r.strip() for r in lines if r]
        return '\n'.join(lines).strip()
@@ -3416,7 +3438,7 @@ class InvoiceAddress(models.Model):
            self.name,
            self.street,
            (self.zipcode or '') + ' ' + (self.city or '') + ' ' + (self.state_for_address or ''),
-            self.country.name,
+            self.country.name if self.country else '',
            self.vat_id,
            self.custom_field,
            self.internal_reference,
@@ -35,6 +35,7 @@ import operator
 import string
 from datetime import date, datetime, time
 from functools import reduce
+from typing import TYPE_CHECKING

 import pytz_deprecation_shim
 from django.conf import settings
@@ -61,6 +62,9 @@ from ...helpers.permission_migration import (
 from ..settings import settings_hierarkey
 from .auth import User

+if TYPE_CHECKING:
+    from hierarkey.proxy import HierarkeyProxy
+

@settings_hierarkey.add(cache_namespace='organizer')
 class Organizer(LoggedModel):
@@ -78,6 +82,9 @@ class Organizer(LoggedModel):
    """

    settings_namespace = 'organizer'
+    if TYPE_CHECKING:
+        settings: HierarkeyProxy
+
    name = models.CharField(max_length=200,
                            verbose_name=_("Name"))
    slug = models.CharField(
@@ -118,7 +118,10 @@ class SeatingPlan(LoggedModel):
        for zi, z in enumerate(self.layout_data['zones']):
            zpos = (z['position']['x'], z['position']['y'])
            for ri, r in enumerate(z['rows']):
-                rpos = (zpos[0] + r['position']['x'], zpos[1] + r['position']['y'])
+                rpos = (
+                    zpos[0] + r.get('position', {}).get('x', 0),
+                    zpos[1] + r.get('position', {}).get('y', 0),
+                )
                row_label = None
                if r.get('row_label'):
                    row_label = r['row_label'].replace("%s", r.get('row_number', str(ri)))
@@ -147,8 +150,8 @@ class SeatingPlan(LoggedModel):
                        zone=z['name'],
                        category=s['category'],
                        sorting_rank=rank,
-                        x=rpos[0] + s['position']['x'],
-                        y=rpos[1] + s['position']['y'],
+                        x=rpos[0] + s.get('position', {}).get('x', 0),
+                        y=rpos[1] + s.get('position', {}).get('y', 0),
                    )


@@ -43,7 +43,7 @@ from django.utils.translation import gettext_lazy as _, pgettext_lazy
 from pretix.base.models import Event, LogEntry
 from pretix.base.signals import register_notification_types
 from pretix.base.templatetags.money import money_filter
-from pretix.helpers.urls import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute

 logger = logging.getLogger(__name__)
 _ALL_TYPES = None
@@ -170,7 +170,7 @@ class ParametrizedOrderNotificationType(NotificationType):
    def build_notification(self, logentry: LogEntry):
        order = logentry.content_object

-        order_url = build_absolute_uri(
+        order_url = mainreverse_absolute(
            'control:event.order',
            kwargs={
                'organizer': logentry.event.organizer.slug,
@@ -71,7 +71,7 @@ from pretix.helpers import OF_SELF
 from pretix.helpers.countries import CachedCountries
 from pretix.helpers.format import format_map
 from pretix.helpers.money import DecimalTextInput
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute
 from pretix.presale.views import get_cart
 from pretix.presale.views.cart import cart_session, get_or_create_cart_id

@@ -379,7 +379,7 @@ class BasePaymentProvider:

        if not self.settings.get('_hidden_seed'):
            self.settings.set('_hidden_seed', get_random_string(64))
-        hidden_url = build_absolute_uri(self.event, 'presale:event.payment.unlock', kwargs={
+        hidden_url = eventreverse_absolute(self.event, 'presale:event.payment.unlock', kwargs={
            'hash': hashlib.sha256((self.settings._hidden_seed + self.event.slug).encode()).hexdigest(),
        })

@@ -834,7 +834,7 @@ class BasePaymentProvider:
        """
        raise NotImplementedError()  # NOQA

-    def execute_payment(self, request: HttpRequest, payment: OrderPayment) -> str:
+    def execute_payment(self, request: HttpRequest, payment: OrderPayment) -> str | None:
        """
        After the user has confirmed their purchase, this method will be called to complete
        the payment process. This is the place to actually move the money if applicable.
@@ -77,6 +77,7 @@ from reportlab.platypus import Paragraph

 from pretix.base.i18n import language
 from pretix.base.models import Checkin, Event, Order, OrderPosition, Question
+from pretix.base.services.placeholders import PlaceholderContext
 from pretix.base.settings import PERSON_NAME_SCHEMES
 from pretix.base.signals import layout_image_variables, layout_text_variables
 from pretix.base.templatetags.money import money_filter
@@ -372,6 +373,11 @@ DEFAULT_VARIABLES = OrderedDict((
        "editor_sample": _("Atlantis"),
        "evaluate": lambda op, order, ev: str(getattr(order.invoice_address.country, 'name', '')) if getattr(order, 'invoice_address', None) else ''
    }),
+    ("invoice_custom_field", {
+        "label": _("Invoice custom recipient field"),
+        "editor_sample": _("Custom recipient field"),
+        "evaluate": lambda op, order, ev: order.invoice_address.custom_field if getattr(order, 'invoice_address', None) else ''
+    }),
    ("addons", {
        "label": _("List of Add-Ons"),
        "editor_sample": _("Add-on 1\n2x Add-on 2"),
@@ -396,11 +402,7 @@ DEFAULT_VARIABLES = OrderedDict((
        "editor_sample": _("Event organizer info text"),
        "evaluate": lambda op, order, ev: str(order.event.settings.organizer_info_text)
    }),
-    ("event_info_text", {
-        "label": _("Event info text"),
-        "editor_sample": _("Event info text"),
-        "evaluate": lambda op, order, ev: str(order.event.settings.event_info_text)
-    }),
+    ("event_info_text", {}),  # Placeholder to "reserve" position, defined later in `get_variables`
    ("now_date", {
        "label": _("Printing date"),
        "editor_sample": _("2017-05-31"),
@@ -665,6 +667,14 @@ def get_images(event):
 def get_variables(event):
    v = copy.copy(DEFAULT_VARIABLES)

+    templating_context = PlaceholderContext(event=event)
+    v['event_info_text'] = {
+        "label": _("Event info text"),
+        "editor_sample": _("Event info text"),
+        "evaluate": lambda op, order, ev:
+            templating_context.format(str(order.event.settings.event_info_text))
+    }
+
    scheme = PERSON_NAME_SCHEMES[event.settings.name_scheme]

    concatenation_for_salutation = scheme.get("concatenation_for_salutation", scheme["concatenation"])
@@ -1062,7 +1072,7 @@ class Renderer:
        except:
            logger.exception('Reshaping/Bidi fixes failed on string {}'.format(repr(text)))

-        p = Paragraph(text, style=style)
+        p = Paragraph(text, style=style)  # not using AutoEscapeParagraph is safe as we escape above
        return p, ad, lineheight

    def _draw_textcontainer(self, canvas: Canvas, op: OrderPosition, order: Order, o: dict):
@@ -22,6 +22,7 @@
 import logging
 from decimal import Decimal

+from django.conf import settings
 from django.db import transaction
 from django.db.models import Count, Exists, IntegerField, OuterRef, Q, Subquery
 from django.utils.crypto import get_random_string
@@ -377,12 +378,13 @@ def cancel_event(self, event: Event, subevent: int, auto_refund: bool,
        confirmation_code = get_random_string(8, allowed_chars="01234567890")
        mail(
            user.email,
-            subject=gettext('Bulk-refund confirmation'),
+            subject=gettext('Confirm event cancellation and bulk refund'),
            template='pretixbase/email/cancel_confirm.txt',
            context={
                "event": str(event),
                "amount": money_filter(refund_total, event.currency),
                "confirmation_code": confirmation_code,
+                "instance": settings.PRETIX_INSTANCE_NAME,
            },
            locale=user.locale,
        )
@@ -40,7 +40,7 @@ import dateutil
 import dateutil.parser
 from dateutil.tz import datetime_exists
 from django.core.files import File
-from django.db import IntegrityError, transaction
+from django.db import IntegrityError
 from django.db.models import (
    BooleanField, Case, Count, ExpressionWrapper, F, IntegerField, Max, Min,
    OuterRef, Q, Subquery, TextField, Value, When,
@@ -59,6 +59,7 @@ from pretix.base.models import (
 )
 from pretix.base.signals import checkin_created, periodic_task
 from pretix.helpers import OF_SELF
+from pretix.helpers.database import conditional_atomic
 from pretix.helpers.jsonlogic import Logic
 from pretix.helpers.jsonlogic_boolalg import convert_to_dnf
 from pretix.helpers.jsonlogic_query import (
@@ -1043,10 +1044,10 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
        if not simulate:
            _save_answers(op, answers, given_answers)

-    with transaction.atomic():
+    with conditional_atomic(not simulate):
        # Lock order positions, if it is an entry. We don't need it for exits, as a race condition wouldn't be problematic
        opqs = OrderPosition.all.select_related("order", "item")
-        if type != Checkin.TYPE_EXIT:
+        if type != Checkin.TYPE_EXIT and not simulate:
            opqs = opqs.select_for_update(of=OF_SELF)
        op = opqs.get(pk=op.pk)

@@ -51,7 +51,7 @@ from pretix.base.signals import (
 )
 from pretix.celery_app import app
 from pretix.helpers import OF_SELF, repeatable_reads_transaction
-from pretix.helpers.urls import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute

 logger = logging.getLogger(__name__)

@@ -340,12 +340,13 @@ def _run_scheduled_export(schedule, context: Union[Event, Organizer], exporter,
            if schedule.owner.is_active:
                mail(
                    email=schedule.owner.email,
-                    subject=gettext('Export failed'),
+                    subject=gettext('Scheduled export failed'),
                    template='pretixbase/email/export_failed.txt',
                    context={
                        'configuration_url': config_url,
                        'reason': msg,
                        'soft': soft,
+                        'instance': settings.PRETIX_INSTANCE_NAME,
                    },
                    event=context if isinstance(context, Event) else None,
                    organizer=context.organizer if isinstance(context, Event) else context,
@@ -455,7 +456,7 @@ def scheduled_organizer_export(self, organizer: Organizer, schedule: int) -> Non
        schedule,
        organizer,
        exporter,
-        build_absolute_uri(
+        mainreverse_absolute(
            'control:organizer.export',
            kwargs={
                'organizer': organizer.slug,
@@ -481,7 +482,7 @@ def scheduled_event_export(self, event: Event, schedule: int) -> None:
        schedule,
        event,
        exporter,
-        build_absolute_uri(
+        mainreverse_absolute(
            'control:event.orders.export',
            kwargs={
                'event': event.slug,
@@ -85,7 +85,7 @@ from pretix.helpers.format import (
    FormattedString, PlainHtmlAlternativeString, SafeFormatter, format_map,
 )
 from pretix.helpers.hierarkey import clean_filename
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute
 from pretix.presale.ical import get_private_icals

 logger = logging.getLogger('pretix.base.mail')
@@ -997,7 +997,7 @@ def _wrap_plain_body(content_plain, signature, event, order, position, no_order_
        body_plain += _(
            "You can view your order details at the following URL:\n{orderurl}."
        ).replace("\n", "\r\n").format(
-            orderurl=build_absolute_uri(
+            orderurl=eventreverse_absolute(
                order.event, 'presale:event.order.position', kwargs={
                    'order': order.code,
                    'secret': position.web_secret,
@@ -1013,7 +1013,7 @@ def _wrap_plain_body(content_plain, signature, event, order, position, no_order_
        body_plain += _(
            "You can view your order details at the following URL:\n{orderurl}."
        ).replace("\n", "\r\n").format(
-            event=event.name, orderurl=build_absolute_uri(
+            event=event.name, orderurl=eventreverse_absolute(
                order.event, 'presale:event.order.open', kwargs={
                    'order': order.code,
                    'secret': order.secret,
@@ -26,8 +26,9 @@ from typing import List
 from django.conf import settings as django_settings
 from django.core.exceptions import ValidationError
 from django.db import transaction
+from django.db.utils import IntegrityError
 from django.utils.timezone import now
-from django.utils.translation import gettext as _
+from django.utils.translation import gettext as _, ngettext

 from pretix.base.i18n import language
 from pretix.base.modelimport import DataImportError, ImportColumn, parse_csv
@@ -260,6 +261,7 @@ def import_vouchers(event: Event, fileid: str, settings: dict, locale: str, user
        # Prepare model objects. Yes, this might consume lots of RAM, but allows us to make the actual SQL transaction
        # shorter. We'll see what works better in reality…
        vouchers = []
+        codes = set()
        lock_seats = []
        for i, record in enumerate(data):
            try:
@@ -268,6 +270,14 @@ def import_vouchers(event: Event, fileid: str, settings: dict, locale: str, user

                if not record.get("code"):
                    raise ValidationError(_('A voucher cannot be created without a code.'))
+                code = record.get("code")
+                if code.upper() in codes:
+                    raise ValidationError(
+                        _('Voucher codes must be unique. Code "{code}" already exists in this import.').format(
+                            code=code,
+                        )
+                    )
+                codes.add(code.upper())
                Voucher.clean_item_properties(
                    record,
                    event,
@@ -286,8 +296,22 @@ def import_vouchers(event: Event, fileid: str, settings: dict, locale: str, user
                    lock_seats.append(voucher.seat)
            except (ValidationError, ImportError) as e:
                raise DataImportError(
-                    _('Invalid data in row {row}: {message}').format(row=i, message=str(e))
+                    _('Invalid data in row {row}: {message}').format(row=i + 1, message=str(e))
                )
+        existing_codes = Voucher.objects.filter(
+            event=event,
+            code__in=codes,
+        ).values_list("code", flat=True)
+        if len(existing_codes):
+            raise DataImportError(
+                ngettext(
+                    'Voucher codes must be unique. Import contains existing voucher code {code}.',
+                    'Voucher codes must be unique. Import contains existing voucher codes {code}.',
+                    len(existing_codes)
+                ).format(
+                    code=", ".join(existing_codes)
+                )
+            )

        with transaction.atomic():
            # We don't support quotas here, so we only need to lock if seats are in use
@@ -300,7 +324,13 @@ def import_vouchers(event: Event, fileid: str, settings: dict, locale: str, user

            save_logentries = []
            for v in vouchers:
-                v.save()
+                try:
+                    v.save()
+                except IntegrityError:
+                    # should not happen as we check existing codes before, but we did not lock so we might have a race-condition
+                    raise DataImportError(
+                        _('Vouchers could not be imported, probably due to a voucher code already being in use.')
+                    )
                save_logentries.append(v.log_action(
                    'pretix.voucher.added',
                    user=user,
@@ -37,7 +37,7 @@ from pretix.base.services.tasks import ProfiledTask, TransactionAwareTask
 from pretix.base.signals import notification
 from pretix.celery_app import app
 from pretix.helpers.celery import get_task_priority
-from pretix.helpers.urls import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute


@app.task(base=TransactionAwareTask, acks_late=True, max_retries=9, default_retry_delay=900)
@@ -136,10 +136,10 @@ def send_notification_mail(notification: Notification, user: User):
        'site_url': settings.SITE_URL,
        'color': settings.PRETIX_PRIMARY_COLOR,
        'notification': notification,
-        'settings_url': build_absolute_uri(
+        'settings_url': mainreverse_absolute(
            'control:user.settings.notifications',
        ),
-        'disable_url': build_absolute_uri(
+        'disable_url': mainreverse_absolute(
            'control:user.settings.notifications.off',
            kwargs={
                'token': user.notifications_token,
@@ -327,7 +327,7 @@ def get_best_name(position_or_address, parts=False):

@receiver(register_text_placeholders, dispatch_uid="pretixbase_register_text_placeholders")
 def base_placeholders(sender, **kwargs):
-    from pretix.multidomain.urlreverse import build_absolute_uri
+    from pretix.multidomain.urlreverse import eventreverse_absolute

    def _event_sample(event):
        if event.has_subevents:
@@ -388,14 +388,14 @@ def base_placeholders(sender, **kwargs):
            lambda event: LazyDate(now() + timedelta(days=15))
        ),
        SimpleFunctionalTextPlaceholder(
-            'url', ['order', 'event'], lambda order, event: build_absolute_uri(
+            'url', ['order', 'event'], lambda order, event: eventreverse_absolute(
                event,
                'presale:event.order.open', kwargs={
                    'order': order.code,
                    'secret': order.secret,
                    'hash': order.email_confirm_secret()
                }
-            ), lambda event: build_absolute_uri(
+            ), lambda event: eventreverse_absolute(
                event,
                'presale:event.order.open', kwargs={
                    'order': 'F8VVL',
@@ -406,7 +406,7 @@ def base_placeholders(sender, **kwargs):
        ),
        SimpleButtonPlaceholder(
            'url_button', ['order', 'event'],
-            url_func=lambda order, event: build_absolute_uri(
+            url_func=lambda order, event: eventreverse_absolute(
                event,
                'presale:event.order.open', kwargs={
                    'order': order.code,
@@ -415,7 +415,7 @@ def base_placeholders(sender, **kwargs):
                }
            ),
            text_func=lambda order, event: _("View order details"),
-            sample_url_func=lambda event: build_absolute_uri(
+            sample_url_func=lambda event: eventreverse_absolute(
                event,
                'presale:event.order.open', kwargs={
                    'order': 'F8VVL',
@@ -426,13 +426,13 @@ def base_placeholders(sender, **kwargs):
            sample_text_func=lambda event: _("View order details"),
        ),
        SimpleFunctionalTextPlaceholder(
-            'url_info_change', ['order', 'event'], lambda order, event: build_absolute_uri(
+            'url_info_change', ['order', 'event'], lambda order, event: eventreverse_absolute(
                event,
                'presale:event.order.modify', kwargs={
                    'order': order.code,
                    'secret': order.secret,
                }
-            ), lambda event: build_absolute_uri(
+            ), lambda event: eventreverse_absolute(
                event,
                'presale:event.order.modify', kwargs={
                    'order': 'F8VVL',
@@ -441,13 +441,13 @@ def base_placeholders(sender, **kwargs):
            ),
        ),
        SimpleFunctionalTextPlaceholder(
-            'url_products_change', ['order', 'event'], lambda order, event: build_absolute_uri(
+            'url_products_change', ['order', 'event'], lambda order, event: eventreverse_absolute(
                event,
                'presale:event.order.change', kwargs={
                    'order': order.code,
                    'secret': order.secret,
                }
-            ), lambda event: build_absolute_uri(
+            ), lambda event: eventreverse_absolute(
                event,
                'presale:event.order.change', kwargs={
                    'order': 'F8VVL',
@@ -456,13 +456,13 @@ def base_placeholders(sender, **kwargs):
            ),
        ),
        SimpleFunctionalTextPlaceholder(
-            'url_cancel', ['order', 'event'], lambda order, event: build_absolute_uri(
+            'url_cancel', ['order', 'event'], lambda order, event: eventreverse_absolute(
                event,
                'presale:event.order.cancel', kwargs={
                    'order': order.code,
                    'secret': order.secret,
                }
-            ), lambda event: build_absolute_uri(
+            ), lambda event: eventreverse_absolute(
                event,
                'presale:event.order.cancel', kwargs={
                    'order': 'F8VVL',
@@ -471,7 +471,7 @@ def base_placeholders(sender, **kwargs):
            ),
        ),
        SimpleFunctionalTextPlaceholder(
-            'url', ['event', 'position'], lambda event, position: build_absolute_uri(
+            'url', ['event', 'position'], lambda event, position: eventreverse_absolute(
                event,
                'presale:event.order.position',
                kwargs={
@@ -480,7 +480,7 @@ def base_placeholders(sender, **kwargs):
                    'position': position.positionid
                }
            ),
-            lambda event: build_absolute_uri(
+            lambda event: eventreverse_absolute(
                event,
                'presale:event.order.position', kwargs={
                    'order': 'F8VVL',
@@ -491,7 +491,7 @@ def base_placeholders(sender, **kwargs):
        ),
        SimpleButtonPlaceholder(
            'url_button', ['event', 'position'],
-            url_func=lambda event, position: build_absolute_uri(
+            url_func=lambda event, position: eventreverse_absolute(
                event,
                'presale:event.order.position', kwargs={
                    'order': position.order.code,
@@ -500,7 +500,7 @@ def base_placeholders(sender, **kwargs):
                }
            ),
            text_func=lambda event, position: _("View registration details"),
-            sample_url_func=lambda event: build_absolute_uri(
+            sample_url_func=lambda event: eventreverse_absolute(
                event,
                'presale:event.order.position', kwargs={
                    'order': 'F8VVL',
@@ -511,14 +511,14 @@ def base_placeholders(sender, **kwargs):
            sample_text_func=lambda event: _("View registration details"),
        ),
        SimpleFunctionalTextPlaceholder(
-            'url_info_change', ['position', 'event'], lambda position, event: build_absolute_uri(
+            'url_info_change', ['position', 'event'], lambda position, event: eventreverse_absolute(
                event,
                'presale:event.order.position.modify', kwargs={
                    'order': position.order.code,
                    'secret': position.web_secret,
                    'position': position.positionid
                }
-            ), lambda event: build_absolute_uri(
+            ), lambda event: eventreverse_absolute(
                event,
                'presale:event.order.position.modify', kwargs={
                    'order': 'F8VVL',
@@ -528,14 +528,14 @@ def base_placeholders(sender, **kwargs):
            ),
        ),
        SimpleFunctionalTextPlaceholder(
-            'url_products_change', ['position', 'event'], lambda position, event: build_absolute_uri(
+            'url_products_change', ['position', 'event'], lambda position, event: eventreverse_absolute(
                event,
                'presale:event.order.position.change', kwargs={
                    'order': position.order.code,
                    'secret': position.web_secret,
                    'position': position.positionid
                }
-            ), lambda event: build_absolute_uri(
+            ), lambda event: eventreverse_absolute(
                event,
                'presale:event.order.position.change', kwargs={
                    'order': 'F8VVL',
@@ -581,20 +581,20 @@ def base_placeholders(sender, **kwargs):
        ),
        SimpleFunctionalTextPlaceholder(
            'url_remove', ['waiting_list_voucher', 'event'],
-            lambda waiting_list_voucher, event: build_absolute_uri(
+            lambda waiting_list_voucher, event: eventreverse_absolute(
                event, 'presale:event.waitinglist.remove'
            ) + '?voucher=' + waiting_list_voucher.code,
-            lambda event: build_absolute_uri(
+            lambda event: eventreverse_absolute(
                event,
                'presale:event.waitinglist.remove',
            ) + '?voucher=68CYU2H6ZTP3WLK5',
        ),
        SimpleFunctionalTextPlaceholder(
            'url', ['waiting_list_voucher', 'event'],
-            lambda waiting_list_voucher, event: build_absolute_uri(
+            lambda waiting_list_voucher, event: eventreverse_absolute(
                event, 'presale:event.redeem'
            ) + '?voucher=' + waiting_list_voucher.code,
-            lambda event: build_absolute_uri(
+            lambda event: eventreverse_absolute(
                event,
                'presale:event.redeem',
            ) + '?voucher=68CYU2H6ZTP3WLK5',
@@ -611,7 +611,7 @@ def base_placeholders(sender, **kwargs):
            'orders', ['event', 'orders'], lambda event, orders: '\n' + '\n\n'.join(
                '* {} - {}'.format(
                    order.full_code,
-                    build_absolute_uri(event, 'presale:event.order.open', kwargs={
+                    eventreverse_absolute(event, 'presale:event.order.open', kwargs={
                        'event': event.slug,
                        'organizer': event.organizer.slug,
                        'order': order.code,
@@ -623,7 +623,7 @@ def base_placeholders(sender, **kwargs):
            ), lambda event: '\n' + '\n\n'.join(
                '* {} - {}'.format(
                    '{}-{}'.format(event.slug.upper(), order['code']),
-                    build_absolute_uri(event, 'presale:event.order.open', kwargs={
+                    eventreverse_absolute(event, 'presale:event.order.open', kwargs={
                        'event': event.slug,
                        'organizer': event.organizer.slug,
                        'order': order['code'],
@@ -662,13 +662,13 @@ def base_placeholders(sender, **kwargs):
            # join vouchers with two spaces at end of line so markdown-parser inserts a <br>
            'voucher_url_list', ['event', 'voucher_list'],
            lambda event, voucher_list: '  \n'.join([
-                build_absolute_uri(
+                eventreverse_absolute(
                    event, 'presale:event.redeem'
                ) + '?voucher=' + c
                for c in voucher_list
            ]),
            lambda event: '  \n'.join([
-                build_absolute_uri(
+                eventreverse_absolute(
                    event, 'presale:event.redeem'
                ) + '?voucher=' + c
                for c in ['68CYU2H6ZTP3WLK5', '7MB94KKPVEPSMVF2']
@@ -676,10 +676,10 @@ def base_placeholders(sender, **kwargs):
            inline=False,
        ),
        SimpleFunctionalTextPlaceholder(
-            'url', ['event', 'voucher_list'], lambda event, voucher_list: build_absolute_uri(event, 'presale:event.index', kwargs={
+            'url', ['event', 'voucher_list'], lambda event, voucher_list: eventreverse_absolute(event, 'presale:event.index', kwargs={
                'event': event.slug,
                'organizer': event.organizer.slug,
-            }), lambda event: build_absolute_uri(event, 'presale:event.index', kwargs={
+            }), lambda event: eventreverse_absolute(event, 'presale:event.index', kwargs={
                'event': event.slug,
                'organizer': event.organizer.slug,
            })
@@ -44,7 +44,7 @@ from django.conf import settings
 from django.utils.crypto import get_random_string
 from django.utils.formats import date_format
 from django.utils.timezone import now
-from django.utils.translation import gettext_lazy as _
+from django.utils.translation import gettext, gettext_lazy as _

 from pretix.base.i18n import language
 from pretix.base.models import CachedFile, Event, User, cachedfile_name
@@ -171,15 +171,16 @@ def shred(self, event: Event, fileid: str, confirm_code: str, user: int=None, lo

    if user:
        with language(user.locale):
+            event_name = str(event.name)
            mail(
                user.email,
-                _('Data shredding completed'),
+                gettext('Data shredding completed for %(event)s') % {'event': event_name},
                'pretixbase/email/shred_completed.txt',
                {
                    'instance': settings.PRETIX_INSTANCE_NAME,
                    'user': user,
                    'organizer': event.organizer.name,
-                    'event': str(event.name),
+                    'event': event_name,
                    'start_time': date_format(parse(indexdata['time']).astimezone(event.timezone), 'SHORT_DATETIME_FORMAT'),
                    'shredders': ', '.join([str(s.verbose_name) for s in shredders])
                },
@@ -37,7 +37,7 @@ from pretix.base.services.mail import mail
 from pretix.base.settings import GlobalSettingsObject
 from pretix.base.signals import periodic_task
 from pretix.celery_app import app
-from pretix.helpers.urls import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute


@receiver(signal=periodic_task)
@@ -121,7 +121,7 @@ def send_update_notification_email():
            )
        ),
        {
-            'url': build_absolute_uri('control:global.update')
+            'url': mainreverse_absolute('control:global.update')
        },
    )

@@ -1276,7 +1276,7 @@ DEFAULTS = {
        'serializer_class': serializers.BooleanField,
        'write_permission': 'event.settings.invoicing:write',
        'form_kwargs': dict(
-            label=_("Allow to update existing invoices"),
+            label=_("Allow updating existing invoices"),
            help_text=_("By default, invoices can never again be changed once they are issued. In most countries, we "
                        "recommend to leave this option turned off and always issue a new invoice if a change needs "
                        "to be made."),
@@ -1924,8 +1924,6 @@ DEFAULTS = {
        'serializer_class': serializers.BooleanField,
        'form_kwargs': dict(
            label=_("Hide all past dates from calendar"),
-            help_text=_("This option currently only affects the calendar of this event series, not the organizer-wide "
-                        "calendar.")
        )
    },
    'allow_modifications': {
@@ -2286,6 +2284,17 @@ DEFAULTS = {
            help_text=_("We'll show this publicly to allow attendees to contact you.")
        )
    },
+    'contact_url': {
+        'default': None,
+        'type': str,
+        'serializer_class': serializers.URLField,
+        'form_class': forms.URLField,
+        'form_kwargs': dict(
+            label=_("Contact URL"),
+            help_text=_("If you set this, the footer contact link will point here instead of using the email address above. "
+                        "Please note that you still need to add a contact email address that will be shared with all emails you send.")
+        )
+    },
    'imprint_url': {
        'default': None,
        'type': str,
@@ -1,10 +1,14 @@
 {% load i18n %}
-{% trans "You have requested us to cancel an event which includes a larger bulk-refund:" %}
+{% trans "You requested to cancel an event that involves a large bulk refund:" %}

-{% trans "Event" %}: {{ event }}
+- {% trans "Event" %}: {{ event }}
+- {% trans "Estimated refund" %}: **{{ amount }}**

-{% trans "Estimated refund amount" %}: **{{ amount }}**
+{% trans "To confirm, paste the following code into the cancellation form:" %}

-{% trans "Please confirm that you want to proceed by coping the following confirmation code into the cancellation form:" %}
+    {{ confirmation_code }}

-**{{ confirmation_code }}**
+{% blocktrans with instance=instance %}Don't share this code with anyone. The {{ instance }} team will never ask you for it.{% endblocktrans %}
+
+{% blocktrans with instance=instance %}Thanks,  
+The {{ instance }} Team{% endblocktrans %}
@@ -1,12 +1,13 @@
 {% load i18n %}
-{% trans "Your export failed." %}
+{% trans "Your scheduled export failed." %}

-{% trans "Reason:" %} {{ reason }}
+- {% trans "Reason" %}: {{ reason }}

-{% if not soft %}
-{% trans "If your export fails five times in a row, it will no longer be sent." %}
-{% endif %}
+{% if not soft %}{% trans "If an export fails five times in a row, we'll stop sending it." %}{% endif %}

-{% trans "Configuration link:" %}
+{% trans "You can adjust or remove this export here:" %}

 {{ configuration_url }}
+
+{% blocktrans with instance=instance %}Thanks,  
+The {{ instance }} Team{% endblocktrans %}
@@ -52,13 +52,13 @@
                    <table cellpadding="20"><tr><td>
            <![endif]-->
            <div class="content">
-                {% trans "You receive these emails based on your notification settings." %}<br>
+                {% trans "You're receiving this email based on your notification settings." %}<br>
                <a href="{{ settings_url }}">
-                    {% trans "Click here to view and change your notification settings" %}
+                    {% trans "Manage settings" %}
                </a>
                {% if disable_url %}<br>
                    <a href="{{ disable_url }}">
-                        {% trans "Click here disable all notifications immediately." %}
+                        {% trans "Disable all notifications" %}
                    </a>
                {% endif %}
            </div>
@@ -1,19 +1,21 @@
 {% load i18n %}
 {{ notification.title }}{% if notification.detail %}

-{{ notification.detail }}
-{% endif %}{% if notification.url %}
+{{ notification.detail }}{% endif %}{% if notification.url %}

-{{ notification.url }}{% endif %}{% for attr in notification.attributes %}
+{{ notification.url }}{% endif %}{% if notification.attributes %}

-{{ attr.title }}: {{ attr.value }}{% endfor %}{% for action in notification.actions %}
+{% for attr in notification.attributes %}- {{ attr.title }}: {{ attr.value }}
+{% endfor %}{% endif %}{% for action in notification.actions %}

-{{ action.label }}
-    {{ action.url }}{% endfor %}
+{{ action.label }}:

-{% trans "You receive these emails based on your notification settings." %}
-{% trans "Click here to view and change your notification settings:" %}
-{{ settings_url }}
-{% if disable_url %}{% trans "Click here disable all notifications immediately:" %}
-{{ disable_url }}
+{{ action.url }}{% endfor %}
+
+---
+
+{% trans "You're receiving this email based on your notification settings." %}
+
+- {% trans "Manage settings" %}: {{ settings_url }}
+{% if disable_url %}- {% trans "Disable all notifications" %}: {{ disable_url }}
 {% endif %}
@@ -1,17 +1,14 @@
-{% load i18n %}
-{% load i18n %}{% blocktrans with url=url|safe %}Hello,
+{% load i18n %}{% blocktrans %}Hello,

-we hereby confirm that the following data shredding job has been completed:
+The following data shredding job has been completed:

-Organizer: {{ organizer }}
+- Organizer: {{ organizer }}
+- Event: {{ event }}
+- Data selection: {{ shredders }}
+- Start time: {{ start_time }}

-Event: {{ event }}
+Any data added to the event after the start time may not have been deleted.

-Data selection: {{ shredders }}
-
-Start time: {{ start_time }} (new data added after this time might not have been deleted)
-
-Best regards,
-
-Your {{ instance }} team
+Thanks,  
+The {{ instance }} Team
 {% endblocktrans %}
@@ -0,0 +1,28 @@
+{% extends "error.html" %}
+{% load i18n %}
+{% load eventurl %}
+{% load urlreplace %}
+{% load static %}
+
+{% block content %}
+    <h1>{% trans "Please continue in a new tab" %}</h1>
+    <p class="larger">
+        {% blocktrans trimmed %}
+            For security reasons, the following step is only possible in a new tab.
+        {% endblocktrans %}
+    </p>
+    <p class="larger">
+        {% blocktrans trimmed %}
+            If the new tab did not open automatically, please click the following button:
+        {% endblocktrans %}
+    </p>
+    <div class="text-center">
+        <a href="{{ url }}"
+           class="btn btn-primary btn-lg" target="_blank">
+            <span class="fa fa-external-link-square"></span>
+            {% trans "Continue in new tab" %}
+        </a>
+        {{ url|json_script:"framebreak-url" }}
+        <script type="text/javascript" src="{% static "pretixbase/js/framebreak.js" %}"></script>
+    </div>
+{% endblock %}
@@ -2,13 +2,14 @@
 {% load i18n %}
 {% load rich_text %}
 {% load static %}
+{% load wrap_in %}
 {% block title %}{% trans "Redirect" %}{% endblock %}
 {% block content %}
 <i class="fa fa-link fa-fw big-icon"></i>
 <div class="error-details">
    <h1>{% trans "Redirect" %}</h1>
    <h3>
-        {% blocktrans trimmed with host="<strong>"|add:hostname|add:"</strong>"|safe %}
+        {% blocktrans trimmed with host=hostname|wrap_in:'strong' %}
        The link you clicked on wants to redirect you to a destination on the website {{ host }}.
        {% endblocktrans %}
        {% blocktrans trimmed %}
@@ -42,8 +42,6 @@ from bleach import DEFAULT_CALLBACKS, html5lib_shim
 from bleach.linkifier import build_email_re
 from django import template
 from django.conf import settings
-from django.core import signing
-from django.urls import reverse
 from django.utils.functional import SimpleLazyObject
 from django.utils.html import escape
 from django.utils.http import url_has_allowed_host_and_scheme
@@ -54,6 +52,7 @@ from markdown.postprocessors import Postprocessor
 from markdown.treeprocessors import UnescapeTreeprocessor
 from tlds import tld_set

+from pretix.base.views.redirect import safelink
 from pretix.helpers.format import SafeFormatter, format_map

 register = template.Library()
@@ -158,8 +157,7 @@ def safelink_callback(attrs, new=False):
    """
    url = html.unescape(attrs.get((None, 'href'), '/'))
    if not url_has_allowed_host_and_scheme(url, allowed_hosts=None) and not url.startswith('mailto:') and not url.startswith('tel:'):
-        signer = signing.Signer(salt='safe-redirect')
-        attrs[None, 'href'] = reverse('redirect') + '?url=' + urllib.parse.quote(signer.sign(url))
+        attrs[None, 'href'] = safelink(url)
        attrs[None, 'target'] = '_blank'
        attrs[None, 'rel'] = 'noopener'
    return attrs
@@ -19,6 +19,7 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
+import logging
 import urllib.parse

 from django.core import signing
@@ -26,6 +27,8 @@ from django.http import HttpResponseBadRequest, HttpResponseRedirect
 from django.shortcuts import render
 from django.urls import reverse

+logger = logging.getLogger(__name__)
+

 def _is_samesite_referer(request):
    referer = request.headers.get('referer')
@@ -42,11 +45,16 @@ def _is_samesite_referer(request):


 def redir_view(request):
-    signer = signing.Signer(salt='safe-redirect')
+    framebreak = "framebreak" in request.GET
+    salt = 'framebreak-safelink-url' if framebreak else 'safelink-url'
    try:
-        url = signer.unsign(request.GET.get('url', ''))
+        url = signing.Signer(salt=salt).unsign(request.GET.get('url', ''))
    except signing.BadSignature:
-        return HttpResponseBadRequest('Invalid parameter')
+        try:
+            # Backwards-compatibility for a change in 2026-06, remove after a while
+            url = signing.Signer(salt='safe-redirect').unsign(request.GET.get('url', ''))
+        except signing.BadSignature:
+            return HttpResponseBadRequest('Invalid parameter')

    if not _is_samesite_referer(request):
        u = urllib.parse.urlparse(url)
@@ -55,11 +63,26 @@ def redir_view(request):
            'url': url,
        })

+    if framebreak:
+        r = render(request, 'pretixbase/framebreak.html', {
+            'url': url,
+        })
+        r.xframe_options_exempt = True
+        return r
+
    r = HttpResponseRedirect(url)
    r['X-Robots-Tag'] = 'noindex'
    return r


-def safelink(url):
-    signer = signing.Signer(salt='safe-redirect')
-    return reverse('redirect') + '?url=' + urllib.parse.quote(signer.sign(url))
+def safelink(url, framebreak=False):
+    url = str(url)
+    if not (url.startswith('https://') or url.startswith('http://') or url.startswith("/")):
+        logger.warning('Invalid URL passed to safelink: %r', url)
+        return '#invalid-url'
+    salt = 'framebreak-safelink-url' if framebreak else 'safelink-url'
+    signer = signing.Signer(salt=salt)
+    u = reverse('redirect') + '?url=' + urllib.parse.quote(signer.sign(url))
+    if framebreak:
+        u += "&framebreak=true"
+    return u
@@ -19,14 +19,56 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
+import logging
 import os

-from celery import Celery
+from celery import Celery, signals
+from django.dispatch import receiver

 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "pretix.settings")
+logger = logging.getLogger(__name__)

 from django.conf import settings

 app = Celery('pretix')
 app.config_from_object('django.conf:settings', namespace='CELERY')
 app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)
+
+
+@receiver(signals.before_task_publish)
+def on_before_task_publish(sender, body, exchange, routing_key, headers, properties, declare, retry_policy, **kwargs):
+    from pretix.helpers.logs import local
+
+    trace = getattr(local, 'trace', [])
+    request_id = getattr(local, 'request_id', None)
+    if request_id:
+        trace.append(request_id)
+
+    headers["X-Pretix-Trace"] = " ".join(trace)
+
+
+@receiver(signals.task_received)
+def on_task_received(sender, request, **kwargs):
+    trace = request._request_dict.get("X-Pretix-Trace")
+    if trace:
+        logger.info(f"Task {request.id} has trace {trace}")
+
+
+@receiver(signals.task_prerun)
+def on_task_prerun(sender, task_id, task, **kwargs):
+    from pretix.helpers.logs import local
+
+    local.request_id = task_id
+    if "X-Pretix-Trace" in task.request.headers:
+        local.trace = task.request.headers["X-Pretix-Trace"].split(" ")
+    else:
+        local.trace = []
+    local.trace.append(task_id)
+
+
+@receiver(signals.task_postrun)
+def on_task_postrun(sender, task_id, task, **kwargs):
+    from pretix.helpers.logs import local
+
+    local.request_id = None
+    local.trace = []
@@ -80,7 +80,7 @@ from pretix.control.forms.widgets import Select2
 from pretix.helpers.countries import CachedCountries
 from pretix.multidomain.models import AlternativeDomainAssignment, KnownDomain
 from pretix.multidomain.urlreverse import (
-    build_absolute_uri, get_organizer_domain,
+    eventreverse_absolute, get_organizer_domain,
 )
 from pretix.plugins.banktransfer.payment import BankTransfer
 from pretix.presale.style import get_fonts
@@ -219,7 +219,7 @@ class EventWizardBasicsForm(I18nModelForm):
        self.fields['location'].widget.attrs['placeholder'] = _(
            'Sample Conference Center\nHeidelberg, Germany'
        )
-        self.fields['slug'].widget.prefix = build_absolute_uri(self.organizer, 'presale:organizer.index')
+        self.fields['slug'].widget.prefix = eventreverse_absolute(self.organizer, 'presale:organizer.index')
        self.fields['tax_rate']._required = True  # Do not render as optional because it is conditionally required
        if self.has_subevents:
            del self.fields['presale_start']
@@ -625,6 +625,7 @@ class EventSettingsForm(EventSettingsValidationMixin, FormPlaceholderMixin, Sett
        'max_items_per_order',
        'reservation_time',
        'contact_mail',
+        'contact_url',
        'show_variations_expanded',
        'hide_sold_out',
        'meta_noindex',
@@ -671,6 +672,11 @@ class EventSettingsForm(EventSettingsValidationMixin, FormPlaceholderMixin, Sett

    base_context = {
        'frontpage_text': ['event'],
+        'presale_has_ended_text': ['event'],
+        'voucher_explanation_text': ['event'],
+        'banner_text': ['event'],
+        'banner_text_bottom': ['event'],
+        'event_info_text': ['event'],
    }

    def _resolve_virtual_keys_input(self, data, prefix=''):
@@ -1673,7 +1679,7 @@ class CountriesAndEUAndStates(CountriesAndEU):

 class TaxRuleLineForm(I18nForm):
    country = LazyTypedChoiceField(
-        choices=CountriesAndEUAndStates(),
+        choices=lazy(lambda: CountriesAndEUAndStates(), CountriesAndEUAndStates),
        required=False
    )
    address_type = forms.ChoiceField(
@@ -1899,6 +1905,12 @@ class QuickSetupForm(I18nForm):
        required=False,
        help_text=_("We'll show this publicly to allow attendees to contact you.")
    )
+    contact_url = forms.URLField(
+        label=_("Contact URL"),
+        required=False,
+        help_text=_("If you set this, the footer contact link will point here instead of using the email address above. "
+                    "Please note that you still need to add a contact email address that will be shared with all emails you send.")
+    )
    total_quota = forms.IntegerField(
        label=_("Total capacity"),
        min_value=0,
@@ -1342,7 +1342,13 @@ class QuestionAnswerFilterForm(forms.Form):
            opqs = opqs.filter(canceled=False)
        if fdata.get("item", "") != "":
            i = fdata.get("item", "")
-            opqs = opqs.filter(item_id__in=(i,))
+            if '-' in i:
+                opqs = opqs.filter(
+                    item_id=i.split('-')[0],
+                    variation_id=i.split('-')[1],
+                )
+            else:
+                opqs = opqs.filter(item_id=i)

        return opqs

@@ -88,7 +88,7 @@ from pretix.control.forms.event import (
 )
 from pretix.control.forms.widgets import Select2, Select2Multiple
 from pretix.multidomain.models import KnownDomain
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute


 class OrganizerForm(I18nModelForm):
@@ -604,6 +604,7 @@ class OrganizerSettingsForm(SettingsForm):
        'customer_accounts_require_login_for_order_access',
        'invoice_regenerate_allowed',
        'contact_mail',
+        'contact_url',
        'imprint_url',
        'organizer_info_text',
        'event_list_type',
@@ -791,7 +792,7 @@ class MailSettingsForm(SettingsForm):
        }

        if 'url' in base_parameters:
-            placeholders['url'] = build_absolute_uri(
+            placeholders['url'] = eventreverse_absolute(
                self.organizer,
                'presale:organizer.customer.activate'
            ) + '?token=' + get_random_string(30)
@@ -106,6 +106,11 @@ class VoucherForm(I18nModelForm):
                pass
        super().__init__(*args, **kwargs)

+        self.fields['tag'].widget.attrs['data-typeahead-url'] = reverse('control:event.vouchers.tags.typeahead', kwargs={
+            'event': instance.event.slug,
+            'organizer': instance.event.organizer.slug,
+        })
+
        if instance.event.has_subevents:
            self.fields['subevent'].queryset = instance.event.subevents.all()
            self.fields['subevent'].widget = Select2(
@@ -36,6 +36,7 @@ from urllib.parse import quote, urljoin, urlparse

 from django.conf import settings
 from django.contrib.auth import REDIRECT_FIELD_NAME, logout
+from django.contrib.auth.views import redirect_to_login
 from django.http import Http404
 from django.shortcuts import get_object_or_404, resolve_url
 from django.template.response import TemplateResponse
@@ -212,14 +213,17 @@ class AuditLogMiddleware:
        if request.path.startswith(get_script_prefix() + 'control') and request.user.is_authenticated:
            if getattr(request.user, "is_hijacked", False):
                hijack_history = request.session.get('hijack_history', False)
-                hijacker = get_object_or_404(User, pk=hijack_history[0])
+                hijacker = get_object_or_404(User, pk=hijack_history[0]["user"])
                ss = hijacker.get_active_staff_session(request.session.get('hijacker_session'))
-                if ss:
-                    ss.logs.create(
-                        url=request.path,
-                        method=request.method,
-                        impersonating=request.user
-                    )
+                if not ss:
+                    # Staff session expired or not found
+                    logout(request)
+                    return redirect_to_login(request.get_full_path())
+                ss.logs.create(
+                    url=request.path,
+                    method=request.method,
+                    impersonating=request.user
+                )
            else:
                ss = request.user.get_active_staff_session(request.session.session_key)
                if ss:
@@ -38,6 +38,7 @@ from pretix import __version__
 from pretix.base.models import Order, OrderPayment, Transaction
 from pretix.base.plugins import get_all_plugins
 from pretix.base.templatetags.money import money_filter
+from pretix.helpers.reportlab import PlainTextParagraph
 from pretix.plugins.reports.exporters import ReportlabExportMixin
 from pretix.settings import DATA_DIR

@@ -79,23 +80,23 @@ class SysReport(ReportlabExportMixin):
        style_small.fontSize = 6

        story = [
-            Paragraph("System report", headlinestyle),
+            PlainTextParagraph("System report", headlinestyle),
            Spacer(1, 5 * mm),
-            Paragraph("Usage", subheadlinestyle),
+            PlainTextParagraph("Usage", subheadlinestyle),
            Spacer(1, 5 * mm),
            self._usage_table(),
            Spacer(1, 5 * mm),
-            Paragraph("Installed versions", subheadlinestyle),
+            PlainTextParagraph("Installed versions", subheadlinestyle),
            Spacer(1, 5 * mm),
            self._tech_table(),
            Spacer(1, 5 * mm),
-            Paragraph("Plugins", subheadlinestyle),
+            PlainTextParagraph("Plugins", subheadlinestyle),
            Spacer(1, 5 * mm),
-            Paragraph(self._get_plugin_versions(), style_small),
+            PlainTextParagraph(self._get_plugin_versions(), style_small),
            Spacer(1, 5 * mm),
-            Paragraph("Custom templates", subheadlinestyle),
+            PlainTextParagraph("Custom templates", subheadlinestyle),
            Spacer(1, 5 * mm),
-            Paragraph(self._get_custom_templates(), style_small),
+            PlainTextParagraph(self._get_custom_templates(), style_small),
            Spacer(1, 5 * mm),
        ]

@@ -121,13 +122,13 @@ class SysReport(ReportlabExportMixin):
            ("RIGHTPADDING", (-1, 0), (-1, -1), 0),
        ]
        tdata = [
-            [Paragraph("Site URL:", style), Paragraph(settings.SITE_URL, style)],
-            [Paragraph("pretix version:", style), Paragraph(__version__, style)],
-            [Paragraph("Python version:", style), Paragraph(sys.version, style)],
-            [Paragraph("Platform:", style), Paragraph(platform.platform(), style)],
+            [PlainTextParagraph("Site URL:", style), Paragraph(settings.SITE_URL, style)],
+            [PlainTextParagraph("pretix version:", style), Paragraph(__version__, style)],
+            [PlainTextParagraph("Python version:", style), Paragraph(sys.version, style)],
+            [PlainTextParagraph("Platform:", style), Paragraph(platform.platform(), style)],
            [
-                Paragraph("Database engine:", style),
-                Paragraph(settings.DATABASES["default"]["ENGINE"], style),
+                PlainTextParagraph("Database engine:", style),
+                PlainTextParagraph(settings.DATABASES["default"]["ENGINE"], style),
            ],
        ]
        table = Table(tdata, colWidths=colwidths, repeatRows=0)
@@ -206,7 +207,7 @@ class SysReport(ReportlabExportMixin):
        year_last = now().year
        tdata = [
            [
-                Paragraph(l, style_small_head)
+                PlainTextParagraph(l, style_small_head)
                for l in (
                    "Time frame",
                    "Currency",
@@ -257,19 +258,19 @@ class SysReport(ReportlabExportMixin):

                tdata.append(
                    (
-                        Paragraph(
+                        PlainTextParagraph(
                            date_format(first_day, "M Y")
                            + " – "
                            + date_format(after_day - timedelta(days=1), "M Y"),
                            style_small,
                        ),
-                        Paragraph(c, style_small),
-                        Paragraph(str(orders_count), style_small) if i == 0 else "",
-                        Paragraph(money_filter(revenue_data.get("s_net") or 0, c), style_small),
-                        Paragraph(str(testmode_count), style_small) if i == 0 else "",
-                        Paragraph(str(unconfirmed_count), style_small) if i == 0 else "",
-                        Paragraph(str(revenue_data.get("c") or 0), style_small),
-                        Paragraph(money_filter(revenue_data.get("s_gross") or 0, c), style_small),
+                        PlainTextParagraph(c, style_small),
+                        PlainTextParagraph(str(orders_count), style_small) if i == 0 else "",
+                        PlainTextParagraph(money_filter(revenue_data.get("s_net") or 0, c), style_small),
+                        PlainTextParagraph(str(testmode_count), style_small) if i == 0 else "",
+                        PlainTextParagraph(str(unconfirmed_count), style_small) if i == 0 else "",
+                        PlainTextParagraph(str(revenue_data.get("c") or 0), style_small),
+                        PlainTextParagraph(money_filter(revenue_data.get("s_gross") or 0, c), style_small),
                    )
                )

@@ -1,13 +1,13 @@
-{% load i18n %}{% blocktrans with url=url|safe messages=messages|safe %}Hello,
+{% load i18n %}{% blocktrans with code=code reason=reason instance=instance %}Hello,

 {{ reason }}

    {{ code }}

-Please do never give this code to another person. Our support team will never ask for this code.
+Don't share this code with anyone. The {{ instance }} team will never ask you for it.

-If this code was not requested by you, please contact us immediately.
+If you didn't request this code, please contact us immediately.

-Best regards,
-Your {{ instance }} team
+Thanks,  
+The {{ instance }} Team
 {% endblocktrans %}
@@ -1,14 +1,15 @@
-{% load i18n %}{% blocktrans with code=code instance=instance %}Hello,
+{% load i18n %}{% blocktrans with code=code address=address instance=instance %}Hello,

-someone requested to use {{ address }} as a sender address on {{ instance }}.
-This will allow them to send emails that are shown to originate from this email address.
-If that was you, please enter the following confirmation code:
+Someone requested to use {{ address }} as a sender address on {{ instance }}. Once verified, emails sent from {{ instance }} can show this address as the sender.

-{{ code }}
+If this was you, enter the following code in the setup form:

-If this was not requested by you, you can safely ignore this email.
+    {{ code }}

-Best regards,  
+Don't share this code with anyone unless you want to authorize them to use this address for this purpose. The {{ instance }} team will never ask you for it.

-Your {{ instance }} team
-{% endblocktrans %}
+If you didn't request this, you can safely ignore this email.
+
+Thanks,  
+The {{ instance }} Team
+{% endblocktrans %}
@@ -1,9 +1,11 @@
 {% load i18n %}{% blocktrans with url=url|safe %}Hello,

-you requested a new password. Please go to the following page to reset your password:
+We received a request to reset the password for your {{ instance }} account. To choose a new password, follow the link below:

 {{ url }}

-Best regards,  
-Your {{ instance }} team
+If you didn't request this, you can safely ignore this email — your password won't change.
+
+Thanks,  
+The {{ instance }} Team
 {% endblocktrans %}
@@ -1,17 +1,16 @@
 {% load i18n %}{% blocktrans with url=url|safe %}Hello,

-you have been invited to a team on {{ instance }}, a platform to perform event
-ticket sales.
+You've been invited to join a team on {{ instance }}, an event ticket sales platform.

-Organizer: {{ organizer }}
-Team: {{ team }}
+- Organizer: {{ organizer }}
+- Team: {{ team }}
+
+To accept, follow the link below:

-If you want to join that team, just click on the following link:
 {{ url }}

-If you do not want to join, you can safely ignore or delete this email.
+If you don't want to join, you can safely ignore this email.

-Best regards,  
-
-Your {{ instance }} team
+Thanks,  
+The {{ instance }} Team
 {% endblocktrans %}
@@ -1,13 +1,19 @@
-{% load i18n %}{% blocktrans with url=url|safe os=source.os_type agent=source.agent_type %}Hello,
+{% load i18n %}{% blocktrans %}Hello,

-a login to your {{ instance }} account from an unusual or new location was detected. The login was performed using {{ agent }} on {{ os }} from {{ country }}.
+We noticed a new sign-in to your {{ instance }} account:
+{% endblocktrans %}
+- {% trans "Time" %}: {{ when }}
+- {% trans "Browser" %}: {{ agent }}
+- {% trans "Operating system" %}: {{ os }}
+{% if device %}- {% trans "Device" %}: {{ device }}
+{% endif %}{% if country %}- {% trans "Country" %}: {{ country }}
+{% endif %}
+{% blocktrans with url=url|safe %}If it was you, no action is needed.

-If this was you, you can safely ignore this email.
-
-If this was not you, we recommend that you change your password in your account settings:
+If you don't recognize this sign-in, please change your password immediately:

 {{ url }}

-Best regards,  
-Your {{ instance }} team
+Thanks,  
+The {{ instance }} Team
 {% endblocktrans %}
@@ -1,16 +1,15 @@
 {% load i18n %}{% blocktrans with url=url|safe messages=messages|safe %}Hello,

-this is to inform you that the account information of your {{ instance }} account has been
-changed. In particular, the following changes have been performed:
+The following changes were made to your {{ instance }} account:

 {{ messages }}

-If this change was not performed by you, please contact us immediately.
+If you didn't make these changes, please contact the {{ instance }} support team immediately.

-You can review and change your account settings here:
+You can review your account settings here:

 {{ url }}

-Best regards,  
-Your {{ instance }} team
+Thanks,  
+The {{ instance }} Team
 {% endblocktrans %}
@@ -193,6 +193,7 @@
                    {% endblocktrans %}
                </p>
                {% bootstrap_field form.contact_mail layout="control" %}
+                {% bootstrap_field form.contact_url layout="control" %}
                {% bootstrap_field form.imprint_url layout="control" %}
            </div>
        </fieldset>
@@ -30,6 +30,7 @@
                {% bootstrap_field form.date_admission layout="control" %}
                {% bootstrap_field form.currency layout="control" %}
                {% bootstrap_field sform.contact_mail layout="control" %}
+                {% bootstrap_field sform.contact_url layout="control" %}
                {% bootstrap_field sform.imprint_url layout="control" %}
                {% bootstrap_field form.is_public layout="control" %}
                {% bootstrap_field form.all_sales_channels layout="control" %}
@@ -34,6 +34,7 @@
                        {% endif %}
                        {% bootstrap_field sform.imprint_url layout="control" %}
                        {% bootstrap_field sform.contact_mail layout="control" %}
+                        {% bootstrap_field sform.contact_url layout="control" %}
                        {% bootstrap_field sform.organizer_info_text layout="control" %}
                        {% bootstrap_field sform.event_team_provisioning layout="control" %}
                        {% if sform.allowed_restricted_plugins %}
@@ -19,9 +19,7 @@
        {% endif %}
    </h1>

-    <script type="application/json" id="editor-data">
-        {{ layout|safe }}
-    </script>
+    {{ layout|json_script:"editor-data" }}
    <div class="row">
        <div class="col-md-9">
            <div class="panel panel-default panel-pdf-editor">
@@ -370,6 +370,7 @@ urlpatterns = [
        re_path(r'^discounts/add$', discounts.DiscountCreate.as_view(), name='event.items.discounts.add'),
        re_path(r'^vouchers/$', vouchers.VoucherList.as_view(), name='event.vouchers'),
        re_path(r'^vouchers/tags/$', vouchers.VoucherTags.as_view(), name='event.vouchers.tags'),
+        re_path(r'^vouchers/tags/typeahead$', typeahead.voucher_tag_typeahead, name='event.vouchers.tags.typeahead'),
        re_path(r'^vouchers/rng$', vouchers.VoucherRNG.as_view(), name='event.vouchers.rng'),
        re_path(r'^vouchers/item_select$', typeahead.itemvarquota_select2, name='event.vouchers.itemselect2'),
        re_path(r'^vouchers/(?P<voucher>\d+)/$', vouchers.VoucherUpdate.as_view(), name='event.voucher'),
@@ -41,7 +41,7 @@ from collections import OrderedDict, defaultdict
 from decimal import Decimal
 from io import BytesIO
 from itertools import groupby
-from urllib.parse import urlparse, urlsplit
+from urllib.parse import urlsplit
 from zoneinfo import ZoneInfo

 import bleach
@@ -64,7 +64,6 @@ from django.shortcuts import get_object_or_404, redirect
 from django.urls import NoReverseMatch, reverse
 from django.utils.functional import cached_property
 from django.utils.html import conditional_escape, format_html
-from django.utils.http import url_has_allowed_host_and_scheme
 from django.utils.safestring import mark_safe
 from django.utils.timezone import now
 from django.utils.translation import gettext, gettext_lazy as _, gettext_noop
@@ -97,7 +96,9 @@ from pretix.control.permissions import EventPermissionRequiredMixin
 from pretix.control.views.mailsetup import MailSettingsSetupView
 from pretix.control.views.user import RecentAuthenticationRequiredMixin
 from pretix.helpers.database import rolledback_transaction
-from pretix.multidomain.urlreverse import build_absolute_uri, get_event_domain
+from pretix.multidomain.urlreverse import (
+    eventreverse_absolute, get_event_domain,
+)
 from pretix.presale.views.widget import (
    version_default as widget_version_default,
 )
@@ -1148,8 +1149,11 @@ class EventLive(EventPermissionRequiredMixin, TemplateView):
            if request.POST.get("delete") == "yes":
                try:
                    with transaction.atomic():
-                        for order in request.event.orders.filter(testmode=True):
-                            order.gracefully_delete(user=self.request.user)
+                        Order.gracefully_delete_bulk(
+                            request.event,
+                            request.event.orders.filter(testmode=True),
+                            user=self.request.user
+                        )
                except ProtectedError:
                    messages.error(self.request, _('An order could not be deleted as some constraints (e.g. data '
                                                   'created by plug-ins) do not allow it.'))
@@ -1734,10 +1738,10 @@ class EventQRCode(EventPermissionRequiredMixin, View):
    permission = None

    def get(self, request, *args, filetype, **kwargs):
-        url = build_absolute_uri(request.event, 'presale:event.index')
+        url = eventreverse_absolute(request.event, 'presale:event.index')

        if "url" in request.GET:
-            if url_has_allowed_host_and_scheme(request.GET["url"], allowed_hosts=[urlparse(url).netloc]):
+            if request.GET["url"].startswith(url):
                url = request.GET["url"]
            else:
                raise PermissionDenied("Untrusted URL")
@@ -28,7 +28,7 @@ from django.core.mail import get_connection
 from django.shortcuts import redirect
 from django.utils.crypto import get_random_string
 from django.utils.functional import cached_property
-from django.utils.translation import gettext_lazy as _
+from django.utils.translation import gettext, gettext_lazy as _
 from django.views.generic import TemplateView

 from pretix.base import email
@@ -216,13 +216,14 @@ class MailSettingsSetupView(TemplateView):
                    messages.error(request, _('The verification code was incorrect, please try again.'))
                else:
                    self.request.session[session_key] = get_random_string(length=6, allowed_chars='1234567890')
+                    sender_address = self.simple_form.cleaned_data.get('mail_from')
                    mail(
-                        self.simple_form.cleaned_data.get('mail_from'),
-                        _('Sender address verification'),
+                        sender_address,
+                        gettext('Confirm %(address)s as a sender address') % {'address': sender_address},
                        'pretixcontrol/email/email_setup.txt',
                        {
                            'code': self.request.session[session_key],
-                            'address': self.simple_form.cleaned_data.get('mail_from'),
+                            'address': sender_address,
                            'instance': settings.PRETIX_INSTANCE_NAME,
                        },
                        None,
@@ -139,6 +139,7 @@ from pretix.helpers import OF_SELF
 from pretix.helpers.compat import CompatDeleteView
 from pretix.helpers.format import SafeFormatter, format_map
 from pretix.helpers.hierarkey import clean_filename
+from pretix.helpers.iter import chunked_iterable
 from pretix.helpers.json import CustomJSONEncoder
 from pretix.helpers.safedownload import check_token
 from pretix.presale.signals import question_form_fields
@@ -240,7 +241,7 @@ class BaseOrderBulkActionView(OrderSearchMixin, EventPermissionRequiredMixin, As
        raise NotImplementedError()

    def execute_bulk(self, queryset: QuerySet, form: forms.Form):
-        qs = self.allowed_for(self.allowed_for(self.get_queryset()))
+        qs = self.allowed_for(self.get_queryset())
        total = qs.count()
        orders_with_successful_action = 0
        for i, o in enumerate(qs):
@@ -394,9 +395,21 @@ class OrderDeleteBulkActionView(BaseOrderBulkActionView):
            testmode=True,
        )

-    def execute_single(self, instance, form: forms.Form):
-        instance.gracefully_delete(user=self.request.user)
-        return True
+    def execute_bulk(self, queryset: QuerySet, form: forms.Form):
+        qs = self.allowed_for(self.get_queryset())
+        total = qs.count()
+        all_ids = list(qs.values_list("id", flat=True))
+
+        orders_with_successful_action = 0
+        for chunk in chunked_iterable(all_ids, 1000):
+            Order.gracefully_delete_bulk(
+                self.request.event,
+                qs.filter(id__in=chunk),
+                user=self.request.user,
+            )
+            orders_with_successful_action += len(chunk)
+            self.async_set_progress(orders_with_successful_action / total * 100)
+        return orders_with_successful_action, total


 class OrderList(OrderSearchMixin, EventPermissionRequiredMixin, PaginationMixin, ListView):
@@ -139,8 +139,8 @@ from pretix.helpers import OF_SELF, GroupConcat
 from pretix.helpers.compat import CompatDeleteView
 from pretix.helpers.dicts import merge_dicts
 from pretix.helpers.format import SafeFormatter, format_map
-from pretix.helpers.urls import build_absolute_uri as build_global_uri
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute
+from pretix.multidomain.urlreverse import eventreverse_absolute
 from pretix.presale.forms.customer import TokenGenerator

 logger = logging.getLogger(__name__)
@@ -1032,14 +1032,16 @@ class TeamMemberView(OrganizerDetailViewMixin, OrganizerPermissionRequiredMixin,
    def _send_invite(self, instance):
        mail(
            instance.email,
-            _('Account invitation'),
+            gettext('You\'ve been invited to join %(organizer)s') % {
+                'organizer': self.request.organizer.name,
+            },
            'pretixcontrol/email/invitation.txt',
            {
                'instance': settings.PRETIX_INSTANCE_NAME,
                'user': self,
                'organizer': self.request.organizer.name,
                'team': instance.team.name,
-                'url': build_global_uri('control:auth.invite', kwargs={
+                'url': mainreverse_absolute('control:auth.invite', kwargs={
                    'token': instance.token
                })
            },
@@ -2851,10 +2853,12 @@ class SSOProviderUpdateView(OrganizerDetailViewMixin, OrganizerPermissionRequire

    def get_context_data(self, **kwargs):
        ctx = super().get_context_data(**kwargs)
-        ctx['redirect_uri'] = build_absolute_uri(self.request.organizer, 'presale:organizer.customer.login.return',
-                                                 kwargs={
-                                                     'provider': self.object.pk
-                                                 })
+        ctx['redirect_uri'] = eventreverse_absolute(
+            self.request.organizer, 'presale:organizer.customer.login.return',
+            kwargs={
+                'provider': self.object.pk
+            }
+        )
        return ctx

    def get_form_kwargs(self):
@@ -3085,7 +3089,7 @@ class CustomerDetailView(OrganizerDetailViewMixin, OrganizerPermissionRequiredMi
            self.customer.log_action('pretix.customer.password.resetrequested', {}, user=self.request.user)
            ctx = self.customer.get_email_context()
            token = TokenGenerator().make_token(self.customer)
-            ctx['url'] = build_absolute_uri(
+            ctx['url'] = eventreverse_absolute(
                self.request.organizer,
                'presale:organizer.customer.recoverpw'
            ) + '?id=' + self.customer.identifier + '&token=' + token
@@ -284,7 +284,7 @@ class BaseEditorView(EventPermissionRequiredMixin, TemplateView):
        ctx['pdf'] = self.get_current_background()
        ctx['variables'] = self.get_variables()
        ctx['images'] = self.get_images()
-        ctx['layout'] = json.dumps(self.get_current_layout())
+        ctx['layout'] = self.get_current_layout()
        ctx['title'] = self.title
        ctx['locales'] = [p for p in settings.LANGUAGES if p[0] in self.request.event.settings.locales]
        ctx['maxfilesize'] = self.maxfilesize
@@ -537,6 +537,7 @@ class SubEventDetail(EventPermissionRequiredMixin, DetailView):
            pcnt=Subquery(
                OrderPosition.objects.filter(
                    subevent=self.object,
+                    order_id=OuterRef("id"),
                ).values("subevent").annotate(c=Count("*")).values("c")
            ),
            has_cancellation_request=Exists(CancellationRequest.objects.filter(order=OuterRef("pk"))),
@@ -975,6 +975,21 @@ def subevent_meta_values(request, organizer, event):
    })


+@event_permission_required('event.vouchers:read')
+def voucher_tag_typeahead(request, **kwargs):
+    q = request.GET.get('q', '')
+    tags = request.event.vouchers.filter(
+        tag__isnull=False,
+        waitinglistentries__isnull=True,
+    ).filter(
+        tag__icontains=q,
+    ).values_list('tag', flat=True).distinct().order_by('tag')[:10]
+
+    return JsonResponse({
+        'results': [{'name': t} for t in tags]
+    })
+
+
 def item_meta_values(request, organizer, event):
    q = request.GET.get('q')
    propname = request.GET.get('property')
@@ -19,19 +19,23 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
+import hmac
 import json
 from contextlib import contextmanager

 from django.conf import settings
 from django.contrib import messages
 from django.contrib.auth import (
-    BACKEND_SESSION_KEY, get_user_model, load_backend, login,
+    BACKEND_SESSION_KEY, HASH_SESSION_KEY, get_user_model, load_backend, login,
+    logout,
 )
 from django.contrib.auth.mixins import LoginRequiredMixin
+from django.contrib.auth.views import redirect_to_login
+from django.core.exceptions import PermissionDenied
 from django.db import transaction
 from django.shortcuts import get_object_or_404, redirect
 from django.urls import reverse
-from django.utils.crypto import get_random_string
+from django.utils.crypto import get_random_string, salted_hmac
 from django.utils.functional import cached_property
 from django.utils.translation import gettext_lazy as _
 from django.views import View
@@ -218,11 +222,13 @@ class UserImpersonateView(AdministratorPermissionRequiredMixin, RecentAuthentica

    def post(self, request, *args, **kwargs):
        self.object = get_object_or_404(User, pk=self.kwargs.get("id"))
+        staff_session = request.user.get_active_staff_session(request.session.session_key)
        self.request.user.log_action('pretix.control.auth.user.impersonated',
                                     user=request.user,
                                     data={
                                         'other': self.kwargs.get("id"),
-                                         'other_email': self.object.email
+                                         'other_email': self.object.email,
+                                         'staff_session': staff_session.pk,
                                     })
        oldkey = request.session.session_key

@@ -230,7 +236,15 @@ class UserImpersonateView(AdministratorPermissionRequiredMixin, RecentAuthentica
        hijacked = self.object

        hijack_history = request.session.get("hijack_history", [])
-        hijack_history.append(request.user._meta.pk.value_to_string(hijacker))
+        hijack_history.append({
+            "user": request.user.pk,
+            # We include the auth_hash, because it is unguessable. So should an attacker gain an attack vector to
+            # modify hijack_history, they can't just insert or change a user that shouldn't be there. We HMAC it
+            # again, though, since we also do not want the auth_hash of the admin user to be in the session of an
+            # unprivileged user to contain the risk if there is some leak of session data.
+            "auth_hash": salted_hmac(key_salt=b"hijack-history-hash", value=request.session[HASH_SESSION_KEY],
+                                     algorithm="sha256", secret=settings.SECRET_KEY).hexdigest(),
+        })

        backend = get_used_backend(request)
        backend = f"{backend.__module__}.{backend.__class__.__name__}"
@@ -238,6 +252,12 @@ class UserImpersonateView(AdministratorPermissionRequiredMixin, RecentAuthentica
        with signals.no_update_last_login(), keep_session_age(request.session):
            login(request, hijacked, backend=backend)

+        request.session.save()
+        staff_session.logs.create(
+            method='(NOTE)',
+            url=f'Begin impersonating user #{hijacked.pk} (request session {oldkey[:8]} -> {request.session.session_key[:8]})',
+        )
+
        request.session["hijack_history"] = hijack_history

        signals.hijack_started.send(
@@ -254,13 +274,28 @@ class UserImpersonateView(AdministratorPermissionRequiredMixin, RecentAuthentica
 class UserImpersonateStopView(LoginRequiredMixin, View):

    def post(self, request, *args, **kwargs):
-        impersonated = request.user
-
-        hijs = request.session['hijacker_session']
+        staff_session_key = request.session['hijacker_session']
+        prev_session_key = request.session.session_key
        hijack_history = request.session.get("hijack_history", [])
        hijacked = request.user
-        user_pk = hijack_history.pop()
-        hijacker = get_object_or_404(get_user_model(), pk=user_pk)
+        prev_session = hijack_history.pop()
+        hijacker = get_object_or_404(get_user_model(), pk=prev_session["user"])
+        staff_session = hijacker.get_active_staff_session(staff_session_key)
+        if not staff_session:
+            raise PermissionDenied
+
+        expected_hash = salted_hmac(
+            key_salt=b"hijack-history-hash",
+            value=hijacker.get_session_auth_hash(),
+            algorithm="sha256",
+            secret=settings.SECRET_KEY
+        ).hexdigest()
+        if not hmac.compare_digest(expected_hash, prev_session["auth_hash"]):
+            # Could be an attacker-controlled hijack history, but could also be e.g. a password change of the admin user
+            # that happened during the hijack session
+            logout(request)
+            return redirect_to_login(request.get_full_path())
+
        backend = get_used_backend(request)
        backend = f"{backend.__module__}.{backend.__class__.__name__}"
        with signals.no_update_last_login(), keep_session_age(request.session):
@@ -275,17 +310,22 @@ class UserImpersonateStopView(LoginRequiredMixin, View):
            hijacked=hijacked,
        )

-        ss = request.user.get_active_staff_session(hijs)
-        if ss:
-            request.session.save()
-            ss.session_key = request.session.session_key
-            ss.save()
+        request.session.save()
+        staff_session.session_key = request.session.session_key
+        staff_session.save()
+
+        staff_session.logs.create(
+            method='(NOTE)',
+            url=f'Stop impersonating user #{hijacked.pk} (request session {prev_session_key[:8]}, '
+                f'staff session {staff_session_key[:8]} -> {request.session.session_key[:8]})',
+        )

        request.user.log_action('pretix.control.auth.user.impersonate_stopped',
                                user=request.user,
                                data={
-                                    'other': impersonated.pk,
-                                    'other_email': impersonated.email
+                                    'other': hijacked.pk,
+                                    'other_email': hijacked.email,
+                                    'staff_session': staff_session.pk,
                                })
        return redirect(reverse('control:index'))

@@ -77,7 +77,7 @@ from pretix.control.views import PaginationMixin
 from pretix.helpers.compat import CompatDeleteView
 from pretix.helpers.format import SafeFormatter, format_map
 from pretix.helpers.models import modelcopy
-from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.multidomain.urlreverse import eventreverse_absolute


 class VoucherList(PaginationMixin, EventPermissionRequiredMixin, ListView):
@@ -338,7 +338,7 @@ class VoucherUpdate(EventPermissionRequiredMixin, UpdateView):
        }
        if self.object.subevent_id:
            url_params['subevent'] = self.object.subevent_id
-        ctx['url'] = build_absolute_uri(self.request.event, "presale:event.redeem") + "?" + urlencode(url_params)
+        ctx['url'] = eventreverse_absolute(self.request.event, "presale:event.redeem") + "?" + urlencode(url_params)
        return ctx


@@ -29,3 +29,8 @@ class PretixHelpersConfig(AppConfig):
    def ready(self):
        from .monkeypatching import monkeypatch_all_at_ready
        monkeypatch_all_at_ready()
+
+        # Ensure reportlab does not make any calls to the internet or the local disk
+        from reportlab import rl_config
+        rl_config.trustedHosts = []
+        rl_config.trustedSchemes = ['data']
@@ -29,36 +29,61 @@ class EnvOrParserConfig:
        self.cp = configparser

    def _envkey(self, section, option):
-        section = re.sub('[^a-zA-Z0-9]', '_', section.upper())
-        option = re.sub('[^a-zA-Z0-9]', '_', option.upper())
-        return f'PRETIX_{section}_{option}'
+        section = re.sub("[^a-zA-Z0-9]", "_", section.upper())
+        option = re.sub("[^a-zA-Z0-9]", "_", option.upper())
+        return f"PRETIX_{section}_{option}"
+
+    def _file_envkey(self, section, option):
+        section = re.sub("[^a-zA-Z0-9]", "_", section.upper())
+        option = re.sub("[^a-zA-Z0-9]", "_", option.upper())
+        return f"FILE__PRETIX_{section}_{option}"

    def get(self, section, option, *, raw=False, vars=None, fallback=_UNSET):
+        if self._file_envkey(section, option) in os.environ:
+            with open(os.environ[self._file_envkey(section, option)], "r") as f:
+                return f.read().strip()
        if self._envkey(section, option) in os.environ:
            return os.environ[self._envkey(section, option)]
        return self.cp.get(section, option, raw=raw, vars=vars, fallback=fallback)

    def getint(self, section, option, *, raw=False, vars=None, fallback=_UNSET):
+        if self._file_envkey(section, option) in os.environ:
+            with open(os.environ[self._file_envkey(section, option)], "r") as f:
+                return int(f.read().strip())
        if self._envkey(section, option) in os.environ:
            return int(os.environ[self._envkey(section, option)])
        return self.cp.getint(section, option, raw=raw, vars=vars, fallback=fallback)

    def getfloat(self, section, option, *, raw=False, vars=None, fallback=_UNSET):
+        if self._file_envkey(section, option) in os.environ:
+            with open(os.environ[self._file_envkey(section, option)], "r") as f:
+                return float(f.read().strip())
        if self._envkey(section, option) in os.environ:
            return float(os.environ[self._envkey(section, option)])
        return self.cp.getfloat(section, option, raw=raw, vars=vars, fallback=fallback)

    def getboolean(self, section, option, *, raw=False, vars=None, fallback=_UNSET):
+        if self._file_envkey(section, option) in os.environ:
+            with open(os.environ[self._file_envkey(section, option)], "r") as f:
+                return self.cp._convert_to_boolean(f.read().strip())
        if self._envkey(section, option) in os.environ:
-            return self.cp._convert_to_boolean(os.environ[self._envkey(section, option)])
-        return self.cp.getboolean(section, option, raw=raw, vars=vars, fallback=fallback)
+            return self.cp._convert_to_boolean(
+                os.environ[self._envkey(section, option)]
+            )
+        return self.cp.getboolean(
+            section, option, raw=raw, vars=vars, fallback=fallback
+        )

    def has_section(self, section):
-        if any(k.startswith(self._envkey(section, '')) for k in os.environ):
+        if any(k.startswith(self._file_envkey(section, "")) for k in os.environ):
+            return True
+        if any(k.startswith(self._envkey(section, "")) for k in os.environ):
            return True
        return self.cp.has_section(section)

    def has_option(self, section, option):
+        if self._file_envkey(section, option) in os.environ:
+            return True
        if self._envkey(section, option) in os.environ:
            return True
        return self.cp.has_option(section, option)
@@ -285,3 +285,12 @@ def get_deterministic_ordering(model, ordering):
            # on the primary key to provide total ordering.
            ordering.append("-pk")
    return ordering
+
+
+@contextlib.contextmanager
+def conditional_atomic(do_atomic, **kwargs):
+    if do_atomic:
+        with transaction.atomic(**kwargs):
+            yield
+    else:
+        yield
@@ -20,6 +20,7 @@
 # <https://www.gnu.org/licenses/>.
 #
 import logging
+import uuid

 from django.core.signals import request_finished
 from django.dispatch import receiver
@@ -46,6 +47,13 @@ class RequestIdFilter(logging.Filter):
        return True


+class SkipNotFoundFilter(logging.Filter):
+    # Drop the WARNING "Not Found: ..." records django.request emits for 404s
+    # We have different access logs for that
+    def filter(self, record):
+        return getattr(record, 'status_code', None) != 404
+
+
 class RequestIdMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response
@@ -58,7 +66,9 @@ class RequestIdMiddleware:
                import sentry_sdk
                sentry_sdk.set_tag("request_id", request.request_id)
        else:
-            local.request_id = request.request_id = None
+            # Web server did not pass a request ID, we still generate one to correlate between django logs and
+            # celery logs
+            local.request_id = request.request_id = str(uuid.uuid4())

        return self.get_response(request)

@@ -27,6 +27,7 @@ from datetime import datetime
 from http import cookies

 from django.conf import settings
+from django.core.exceptions import SuspiciousFileOperation
 from PIL import Image
 from requests.adapters import HTTPAdapter
 from urllib3.connection import HTTPConnection, HTTPSConnection
@@ -40,6 +41,8 @@ from urllib3.util.connection import (
 )
 from urllib3.util.timeout import _DEFAULT_TIMEOUT

+from pretix.helpers.reportlab import ThumbnailingImageReader
+
 _cgnat_net = ipaddress.ip_network('100.64.0.0/10')


@@ -148,13 +151,14 @@ def monkeypatch_urllib3_ssrf_protection():

            if not getattr(settings, "ALLOW_HTTP_TO_PRIVATE_NETWORKS", False):
                ip_addr = ipaddress.ip_address(sa[0])
+                check_ip4 = ip_addr.ipv4_mapped if getattr(ip_addr, "ipv4_mapped", None) else ip_addr
                if ip_addr.is_multicast:
                    raise HTTPError(f"Request to multicast address {sa[0]} blocked")
                if ip_addr.is_loopback or ip_addr.is_link_local:
                    raise HTTPError(f"Request to local address {sa[0]} blocked")
                if ip_addr.is_private:
                    raise HTTPError(f"Request to private address {sa[0]} blocked")
-                if ip_addr in _cgnat_net:
+                if check_ip4 in _cgnat_net:
                    raise HTTPError(f"Request to RFC 6598 address {sa[0]} blocked")

            sock = None
@@ -230,9 +234,27 @@ def monkeypatch_cookie_morsel():
    cookies.Morsel._reserved.setdefault("partitioned", "Partitioned")


+def monkeypatch_reportlab_imagereader():
+    from reportlab.lib import utils
+    old_init = utils.ImageReader.__init__
+
+    def new_init(self, fileName, ident=None):  # noqa
+        if not isinstance(fileName, Image.Image) and not hasattr(fileName, 'read') and not hasattr(fileName, 'str'):
+            if not isinstance(self, ThumbnailingImageReader):
+                # ThumbnailingImageReader is only used by us explicitly and not by using <img> in html, so it is safe
+                raise SuspiciousFileOperation("reportlab should not be reading images from disk")
+
+        return types.MethodType(old_init, self)(
+            fileName, ident
+        )
+
+    utils.ImageReader.__init__ = new_init
+
+
 def monkeypatch_all_at_ready():
    monkeypatch_vobject_performance()
    monkeypatch_pillow_safer()
    monkeypatch_requests_timeout()
    monkeypatch_urllib3_ssrf_protection()
    monkeypatch_cookie_morsel()
+    monkeypatch_reportlab_imagereader()
@@ -25,6 +25,19 @@ import text_unidecode
 from django.utils.safestring import mark_safe
 from django.utils.translation import gettext_lazy as _

+EPC_QR_ALLOWED_CHARS = set(
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    "abcdefghijklmnopqrstuvwxyz"
+    "0123456789/-?:().,'+ "
+)
+
+
+def epc_qr_field(value):
+    return ''.join(
+        char for char in text_unidecode.unidecode(str(value or ''))
+        if char in EPC_QR_ALLOWED_CHARS
+    )
+

 def dotdecimal(value):
    return str(value).replace(",", ".")
@@ -77,7 +90,7 @@ def euro_epc_qr(
    return {
        "id": "girocode",
        "label": "EPC-QR",
-        "qr_data": "\n".join(text_unidecode.unidecode(str(d or '')) for d in [
+        "qr_data": "\n".join(epc_qr_field(d) for d in [
            "BCD",   # Service Tag: ‘BCD’
            "002",   # Version: V2
            "2",     # Character set: ISO 8859-1
@@ -20,14 +20,19 @@
 # <https://www.gnu.org/licenses/>.
 #
 import logging
+import re
+import unicodedata

 from arabic_reshaper import ArabicReshaper
+from bidi import get_display
 from django.conf import settings
 from django.utils.functional import SimpleLazyObject
+from django.utils.html import escape
 from PIL import Image
 from reportlab.lib.styles import ParagraphStyle
 from reportlab.lib.utils import ImageReader
 from reportlab.pdfbase import pdfmetrics
+from reportlab.pdfbase.ttfonts import TTFont
 from reportlab.platypus import Paragraph

 from pretix.presale.style import get_fonts
@@ -70,6 +75,20 @@ reshaper = SimpleLazyObject(lambda: ArabicReshaper(configuration={
 }))


+def normalize_text(text: str) -> str:
+    # reportlab does not support unicode combination characters
+    # It's important we do this before we use ArabicReshaper
+    text = unicodedata.normalize("NFKC", text)
+
+    # reportlab does not support RTL, ligature-heavy scripts like Arabic. Therefore, we use ArabicReshaper
+    # to resolve all ligatures and python-bidi to switch RTL texts.
+    try:
+        text = "\n".join(get_display(reshaper.reshape(l)) for l in re.split("\n", text))
+    except:
+        logger.exception('Reshaping/Bidi fixes failed on string {}'.format(repr(text)))
+    return text
+
+
 class FontFallbackParagraph(Paragraph):
    def __init__(self, text, style=None, *args, **kwargs):
        if style is None:
@@ -87,6 +106,8 @@ class FontFallbackParagraph(Paragraph):
        if not text:
            return True
        font = pdfmetrics.getFont(font_name)
+        if not isinstance(font, TTFont):
+            return True
        return all(
            ord(c) in font.face.charToGlyph or not c.isprintable()
            for c in text
@@ -102,6 +123,24 @@ class FontFallbackParagraph(Paragraph):
                return family


+class PlainTextParagraph(FontFallbackParagraph):
+    def __init__(self, text, style=None, linebreaks=True, *args, **kwargs):
+        if not isinstance(text, str):
+            if hasattr(text, '__html__'):
+                raise ValueError("It is contradictory to pass escaped content to PlainTextParagraph")
+            text = str(text)
+
+        # Normalize unicode and apply reshaping
+        text = normalize_text(text)
+
+        # Escape any HTML in the text
+        text = escape(text)
+
+        if linebreaks:
+            text = text.strip().replace("\n", "<br />\n")
+        super().__init__(text, style, *args, **kwargs)
+
+
 def register_ttf_font_if_new(name, path):
    from reportlab.pdfbase import pdfmetrics
    from reportlab.pdfbase.ttfonts import TTFont
@@ -27,6 +27,7 @@ from django.conf import settings
 from django.contrib.auth import login as auth_login
 from django.contrib.gis import geoip2
 from django.core.cache import cache
+from django.utils.formats import date_format
 from django.utils.timezone import now
 from django.utils.translation import gettext_lazy as _
 from django_countries.fields import Country
@@ -35,7 +36,7 @@ from geoip2.errors import AddressNotFoundError
 from pretix.base.i18n import language
 from pretix.base.services.mail import mail
 from pretix.helpers.http import get_client_ip
-from pretix.helpers.urls import build_absolute_uri
+from pretix.helpers.urls import mainreverse_absolute

 logger = logging.getLogger(__name__)

@@ -169,13 +170,17 @@ def handle_login_source(user, request):
            with language(user.locale):
                mail(
                    user.email,
-                    _('Login from new source detected'),
+                    _('New sign-in to your account'),
                    'pretixcontrol/email/login_notice.txt',
                    {
-                        'source': src,
-                        'country': Country(str(country)).name if country else _('Unknown country'),
+                        'when': date_format(src.last_seen, 'DATETIME_FORMAT'),
+                        'agent': src.agent_type,
+                        'os': src.os_type,
+                        # ua-parser returns "Other" for unidentified desktop devices.
+                        'device': src.device_type if src.device_type and src.device_type != 'Other' else None,
+                        'country': Country(str(country)).name if country else None,
                        'instance': settings.PRETIX_INSTANCE_NAME,
-                        'url': build_absolute_uri('control:user.settings')
+                        'url': mainreverse_absolute('control:user.settings')
                    },
                    event=None,
                    user=user,
@@ -0,0 +1,33 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
+import logging
+
+from django import template
+from django.utils.html import format_html
+
+register = template.Library()
+logger = logging.getLogger(__name__)
+
+
+@register.filter
+def wrap_in(content, tag_name):
+    return format_html(f'<{tag_name}>{{}}</{tag_name}>', content)
@@ -19,6 +19,7 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
+import warnings
 from urllib.parse import urljoin

 from django.conf import settings
@@ -26,6 +27,15 @@ from django.urls import reverse


 def build_absolute_uri(urlname, args=None, kwargs=None):
+    warnings.warn(
+        'Usage of build_absolute_uri is confusing since there are many functions with that name. '
+        'Replace this usage with ',
+        DeprecationWarning
+    )
+    return mainreverse_absolute(urlname, args, kwargs)
+
+
+def mainreverse_absolute(urlname, args=None, kwargs=None):
    from pretix.multidomain import maindomain_urlconf

    return urljoin(settings.SITE_URL, reverse(urlname, args=args, kwargs=kwargs, urlconf=maindomain_urlconf))
--- a/Show More
+++ b/Show More