Tests

Harden StaffSession handling

See merge request pretix/pretix!42

pyproject.toml

@@ -53,6 +53,7 @@ dependencies = [
   "django-oauth-toolkit==2.3.*",
   "django-otp==1.7.*",
   "django-phonenumber-field==8.4.*",
+  "django-querytagger==0.0.2",
   "django-redis==6.0.*",
   "django-scopes==2.0.*",
   "django-statici18n==2.7.*",
@@ -93,7 +94,7 @@ dependencies = [
   "redis==7.4.*",
   "reportlab==4.5.*",
   "requests==2.32.*",
-  "sentry-sdk==2.63.*",
+  "sentry-sdk==2.64.*",
   "sepaxml==2.7.*",
   "stripe==7.9.*",
   "text-unidecode==1.*",

src/Makefile

@@ -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 -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)
+	./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

src/pretix/__init__.py

@@ -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"
+__version__ = "2026.7.0.dev0"

src/pretix/_base_settings.py

@@ -118,6 +118,7 @@ ALL_LANGUAGES = [
     ('sv', _('Swedish')),
     ('es', _('Spanish')),
     ('es-419', _('Spanish (Latin America)')),
+    ('th', _('Thai')),
     ('tr', _('Turkish')),
     ('uk', _('Ukrainian')),
 ]

src/pretix/base/middleware.py

@@ -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
 
 
@@ -223,7 +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)
 
 
@@ -243,21 +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
@@ -268,18 +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}"],
@@ -288,8 +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
@@ -298,6 +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'"]
@@ -309,6 +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
@@ -317,27 +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:
@@ -348,18 +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):

src/pretix/base/models/auth.py

@@ -647,25 +647,22 @@ 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()

src/pretix/base/settings.py

@@ -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': {

src/pretix/base/templatetags/rich_text.py

@@ -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

src/pretix/control/middleware.py

@@ -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
@@ -214,12 +215,15 @@ class AuditLogMiddleware:
                 hijack_history = request.session.get('hijack_history', False)
                 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:

src/pretix/control/templates/pretixcontrol/email_setup_simple.html

@@ -50,6 +50,46 @@
                         {% endblocktrans %}
                     </div>
                 {% endif %}
+                {% if dkim_warning %}
+                    <div class="alert alert-danger">
+                        <p>
+                            {{ dkim_warning }}
+                        </p>
+                        <p>
+                            {% trans "Your new DKIM record should be set up as a CNAME record like this:" %}
+                        </p>
+                        <pre><code>{{ dkim_hostname }}  CNAME  {{ dkim_cname }}</code></pre>
+                        <p>
+                            {% trans "Please keep in mind that updates to DNS might require multiple hours to take effect." %}
+                        </p>
+                    </div>
+                {% elif dkim_cname %}
+                    <div class="alert alert-success">
+                        {% blocktrans trimmed %}
+                            We found a DKIM record on your domain for this system. Great!
+                        {% endblocktrans %}
+                    </div>
+                {% endif %}
+                {% if dmarc_warning %}
+                    <div class="alert alert-danger">
+                        <p>
+                            {{ dmarc_warning }}
+                        </p>
+                        <p>
+                            {% trans "Your new DMARC record could look like this:" %}
+                        </p>
+                        <pre><code>_dmarc.{{ hostname }}  TXT  "v=DMARC1; p=quarantine; sp=none; adkim=r; aspf=r;"</code></pre>
+                        <p>
+                            {% trans "Please keep in mind that updates to DNS might require multiple hours to take effect." %}
+                        </p>
+                    </div>
+                {% elif dkim_cname %}
+                    <div class="alert alert-success">
+                        {% blocktrans trimmed %}
+                            We found a DMARC record on your domain for this system. Great!
+                        {% endblocktrans %}
+                    </div>
+                {% endif %}
                 {% if verification %}
                     <h3>{% trans "Verification" %}</h3>
                     <p>
@@ -70,7 +110,7 @@
             </div>
         </div>
 
-        {% if spf_warning %}
+        {% if spf_warning or dkim_warning or dmarc_warning %}
             <div class="form-group submit-group">
                 <a href="" class="btn btn-default btn-save">
                     {% trans "Cancel" %}

src/pretix/control/views/mailsetup.py

@@ -41,6 +41,30 @@ from pretix.control.forms.mailsetup import SimpleMailForm, SMTPMailForm
 logger = logging.getLogger(__name__)
 
 
+def get_cname_record(hostname):
+    try:
+        r = dns.resolver.Resolver()
+        answers = r.resolve(hostname, 'CNAME')
+        answers = list(answers)
+        if len(answers) != 1:
+            logger.exception('Found multiple CNAME records for {}'.format(hostname))
+            return
+        return str(answers[0].target).lower()
+    except:
+        logger.exception('Could not fetch CNAME record for {}'.format(hostname))
+
+
+def get_dmarc_record(hostname):
+    try:
+        r = dns.resolver.Resolver()
+        for resp in r.resolve("_dmarc." + hostname, 'TXT'):
+            data = b''.join(resp.strings).decode()
+            if 'DMARC1' in data.strip():
+                return data
+    except:
+        logger.exception("Could not fetch DMARC record for {}".format(hostname))
+
+
 def get_spf_record(hostname):
     try:
         r = dns.resolver.Resolver()
@@ -49,7 +73,7 @@ def get_spf_record(hostname):
             if data.lower().strip().startswith('v=spf1 '):  # RFC7208, section 4.5
                 return data
     except:
-        logger.exception("Could not fetch SPF record")
+        logger.exception("Could not fetch SPF record for {}".format(hostname))
 
 
 def _check_spf_record(not_found_lookup_parts, spf_record, depth):
@@ -168,10 +192,15 @@ class MailSettingsSetupView(TemplateView):
                 return super().get(request, *args, **kwargs)
 
             session_key = f'sender_mail_verification_code_{self.request.path}_{self.simple_form.cleaned_data.get("mail_from")}'
+            verify_dns = (
+                settings.MAIL_CUSTOM_SENDER_SPF_STRING or
+                (settings.MAIL_CUSTOM_SENDER_DKIM_CNAME and settings.MAIL_CUSTOM_SENDER_DMARC_REQUIRED) or
+                settings.MAIL_CUSTOM_SENDER_DMARC_REQUIRED
+            )
             allow_save = (
                 (not settings.MAIL_CUSTOM_SENDER_VERIFICATION_REQUIRED or
                  ('verification' in self.request.POST and self.request.POST.get('verification', '') == self.request.session.get(session_key, None))) and
-                (not settings.MAIL_CUSTOM_SENDER_SPF_STRING or self.request.POST.get('state') == 'save')
+                (not verify_dns or self.request.POST.get('state') == 'save')
             )
 
             if allow_save:
@@ -192,8 +221,8 @@ class MailSettingsSetupView(TemplateView):
 
             spf_warning = None
             spf_record = None
+            hostname = self.simple_form.cleaned_data['mail_from'].split('@')[-1]
             if settings.MAIL_CUSTOM_SENDER_SPF_STRING:
-                hostname = self.simple_form.cleaned_data['mail_from'].split('@')[-1]
                 spf_record = get_spf_record(hostname)
                 if not spf_record:
                     spf_warning = _(
@@ -210,7 +239,43 @@ class MailSettingsSetupView(TemplateView):
                         'this system in the SPF record.'
                     )
 
-            verification = settings.MAIL_CUSTOM_SENDER_VERIFICATION_REQUIRED and not spf_warning
+            dkim_warning = None
+            dkim_hostname = None
+            dkim_cname = None
+            if settings.MAIL_CUSTOM_SENDER_DKIM_CNAME and settings.MAIL_CUSTOM_SENDER_DKIM_SELECTOR:
+                dkim_hostname = settings.MAIL_CUSTOM_SENDER_DKIM_SELECTOR + '._domainkey.' + hostname
+                cname_target = get_cname_record(dkim_hostname)
+                dkim_cname = settings.MAIL_CUSTOM_SENDER_DKIM_CNAME
+                if not dkim_cname.endswith("."):
+                    dkim_cname += "."
+                if "%s" in dkim_cname:
+                    dkim_cname = dkim_cname.replace("%s", hostname.replace(".", "-").lower())
+                if not cname_target:
+                    dkim_warning = _(
+                        'We could not find a CNAME record pointing to our DKIM key for domain you are trying to use. '
+                        'This means that there is a very high change most of the emails will be rejected or marked as '
+                        'spam. We strongly recommend setting up DKIM through a CNAME record. You can do so through the '
+                        'DNS settings at the provider you registered your domain with.'
+                    )
+                elif cname_target != dkim_cname:
+                    dkim_warning = _(
+                        'We found a CNAME record for a DKIM key, but it is not pointing to the right location. '
+                        'This means that there is a very high chance most of the emails will be rejected or marked as '
+                        'spam. You should update the DNS settings of your domain.'
+                    )
+
+            dmarc_warning = None
+            dmarc_record = None
+            if settings.MAIL_CUSTOM_SENDER_DMARC_REQUIRED:
+                dmarc_record = get_dmarc_record(hostname)
+                if not dmarc_record:
+                    spf_warning = _(
+                        'We did not find DMARC record for your domain. This means that there is a very high chance '
+                        'most of the emails will be rejected or marked as spam. You should update the DNS settings '
+                        'of your domain.'
+                    )
+
+            verification = settings.MAIL_CUSTOM_SENDER_VERIFICATION_REQUIRED and not spf_warning and not dkim_warning and not dmarc_warning
             if verification:
                 if 'verification' in self.request.POST:
                     messages.error(request, _('The verification code was incorrect, please try again.'))
@@ -240,6 +305,12 @@ class MailSettingsSetupView(TemplateView):
                     'spf_warning': spf_warning,
                     'spf_record': spf_record,
                     'spf_key': settings.MAIL_CUSTOM_SENDER_SPF_STRING,
+                    'dkim_warning': dkim_warning,
+                    'dkim_hostname': dkim_hostname,
+                    'dkim_cname': dkim_cname,
+                    'dmarc_warning': dmarc_warning,
+                    'dmarc_record': dmarc_record,
+                    'hostname': hostname,
                     'recp': self.simple_form.cleaned_data.get('mail_from')
                 },
                 using=self.template_engine,

src/pretix/control/views/users.py

@@ -31,6 +31,7 @@ from django.contrib.auth import (
 )
 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
@@ -221,11 +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
 
@@ -249,6 +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(
@@ -265,13 +274,15 @@ 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
         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",
@@ -299,17 +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'))
 

src/pretix/presale/templates/pretixpresale/fragment_calendar.html

@@ -21,22 +21,21 @@
                             data-date="{{ day.date|date_fast:"SHORT_DATE_FORMAT" }}">
                             <p>
                             {% if day.events %}
-                                <a href="#selected-day" class="day-label event hidden-sm hidden-md hidden-lg">
+                                <a href="#selected-day" class="day-label event hidden-sm hidden-md hidden-lg" aria-describedby="nr-of-events-{{ day.date|date_fast:"Y-m-d" }}">
                                     <b aria-hidden="true">{{ day.day }}</b>
                                     <time datetime="{{ day.date|date_fast:"Y-m-d" }}" class="sr-only">
                                         {{ day.date|date_fast:"SHORT_DATE_FORMAT" }}
                                     </time>
-                                    <span class="sr-only">
-                                        ({% blocktrans trimmed count count=day.events|length %}
-                                            {{ count }} event
-                                        {% plural %}
-                                            {{ count }} events
-                                        {% endblocktrans %})
-                                    </span>
+                                    <span class="sr-only" id="nr-of-events-{{ day.date|date_fast:"Y-m-d" }}">{% blocktrans trimmed count count=day.events|length %}
+                                        {{ count }} event
+                                    {% plural %}
+                                        {{ count }} events
+                                    {% endblocktrans %}</span>
                                 </a>
                                 <time datetime="{{ day.date|date_fast:"Y-m-d" }}" class="hidden-xs">{{ day.day }}</time>
                             {% else %}
                                 <time datetime="{{ day.date|date_fast:"Y-m-d" }}" class="day-label">{{ day.day }}</time>
+                                <span class="sr-only">{% trans "No events" %}</span>
                             {% endif %}
                             </p>
                             <ul class="events">

src/pretix/presale/views/organizer.py

@@ -650,6 +650,10 @@ def add_subevents_for_days(qs, before, after, ebd, timezones, sales_channel, eve
             if hide:
                 continue
 
+        if s.event_calendar_future_only:
+            if (se.date_to or se.date_from) < time_machine_now():
+                continue
+
         timezones.add(s.timezone)
         tz = ZoneInfo(s.timezone)
         datetime_from = se.date_from.astimezone(tz)

src/pretix/settings.py

@@ -257,6 +257,9 @@ MAIL_FROM_NOTIFICATIONS = config.get('mail', 'from_notifications', fallback=MAIL
 MAIL_FROM_ORGANIZERS = config.get('mail', 'from_organizers', fallback=MAIL_FROM)
 MAIL_CUSTOM_SENDER_VERIFICATION_REQUIRED = config.getboolean('mail', 'custom_sender_verification_required', fallback=True)
 MAIL_CUSTOM_SENDER_SPF_STRING = config.get('mail', 'custom_sender_spf_string', fallback='')
+MAIL_CUSTOM_SENDER_DKIM_SELECTOR = config.get('mail', 'custom_sender_dkim_selector', fallback='')
+MAIL_CUSTOM_SENDER_DKIM_CNAME = config.get('mail', 'custom_sender_dkim_cname', fallback='')
+MAIL_CUSTOM_SENDER_DMARC_REQUIRED = config.getboolean('mail', 'custom_sender_dmarc_required', fallback=False)
 MAIL_CUSTOM_SMTP_ALLOW_PRIVATE_NETWORKS = config.getboolean('mail', 'custom_smtp_allow_private_networks', fallback=DEBUG)
 EMAIL_HOST = config.get('mail', 'host', fallback='localhost')
 EMAIL_PORT = config.getint('mail', 'port', fallback=25)
@@ -440,6 +443,7 @@ CSRF_COOKIE_NAME = 'pretix_csrftoken'
 SESSION_COOKIE_HTTPONLY = True
 
 INSTALLED_APPS += [ # noqa
+    'django_querytagger',
     'django_filters',
     'django_markup',
     'django_otp',
@@ -505,6 +509,7 @@ MIDDLEWARE = [
     'pretix.helpers.logs.RequestIdMiddleware',
     'pretix.api.middleware.IdempotencyMiddleware',
     'pretix.multidomain.middlewares.MultiDomainMiddleware',
+    'django_querytagger.middleware.SetTagMiddleware',  # after MultiDomainMiddleware for correct url resolving
     'pretix.base.middleware.CustomCommonMiddleware',
     'pretix.multidomain.middlewares.SessionMiddleware',
     'pretix.multidomain.middlewares.CsrfViewMiddleware',

src/tests/base/test_middleware.py

@@ -126,3 +126,81 @@ class LocaleDeterminationTest(TestCase):
         response = c.get('/dummy/dummy/')
         language = response['Content-Language']
         self.assertEqual(language, 'en')
+
+
+def test_render_csp():
+    from pretix.base.middleware import _render_csp
+
+    assert _render_csp({}) == ""
+    assert _render_csp({'default-src': ["'self'"]}) == "default-src 'self'"
+
+    h = {
+        'default-src': ["'self'"],
+        'script-src': ["'self'"],
+        'object-src': ["'none'"],
+        'frame-src': ["'self'"],
+        'style-src': ["'self'", "'self'"],
+        'connect-src': ["'self'", "'self'"],
+        'img-src': ["'self'", "'self'", "data:"],
+        'font-src': ["'self'"],
+        'media-src': ["'self'", "data:"],
+        'form-action': ["'self'", "https:"],
+    }
+    assert _render_csp(h) == (
+        "default-src 'self'; script-src 'self'; object-src 'none'; frame-src 'self'; style-src 'self' 'self'; "
+        "connect-src 'self' 'self'; img-src 'self' 'self' data:; font-src 'self'; media-src 'self' data:; form-action 'self' https:"
+    )
+
+
+def test_merge_csp():
+    from pretix.base.middleware import _merge_csp, _parse_csp, _render_csp
+
+    h = {
+        'default-src': ["'self'"],
+        'script-src': ["'self'"],
+        'style-src': ["'self'", "'self'"],
+        'form-action': ["'self'", "https:"],
+        'connect-src': ["'self'", "'self'"],
+    }
+    assert _render_csp(h) == (
+        "default-src 'self'; script-src 'self'; style-src 'self' 'self'; form-action 'self' https:; connect-src 'self' 'self'"
+    )
+
+    _merge_csp(h, _parse_csp("style-src 'unsafe-inline'; connect-src https://example.com"))
+    assert _render_csp(h) == (
+        "default-src 'self'; script-src 'self'; style-src 'self' 'self' 'unsafe-inline'; form-action 'self' "
+        "https:; connect-src 'self' 'self' https://example.com"
+    )
+
+
+def test_roundtrip_csp():
+    from pretix.base.middleware import _merge_csp, _parse_csp, _render_csp
+
+    prod_csp = ("default-src 'self' https://pretix.eu https://static.pretix.cloud; script-src 'self' "
+                "'sha256-+tmFggeXIPOAC2UgcQ3LW/gPHTkwyWg3/D6FOJ5BHGo=' 'unsafe-eval' https://matomo.rami.io "
+                "https://pretix.eu https://static.pretix.cloud https://support.rami.io; object-src 'none'; "
+                "frame-src 'self' https://matomo.rami.io https://pretix.eu https://static.pretix.cloud "
+                "https://support.rami.io https://www.youtube-nocookie.com; style-src 'self' 'unsafe-inline' "
+                "data: https://cdn.pretix.cloud https://pretix.eu https://static.pretix…rt.rami.io; connect-src "
+                "'self' https://cdn.pretix.cloud https://matomo.rami.io https://pretix.eu https://static.pretix.cloud "
+                "https://support.rami.io ws://support.rami.io; img-src 'self' data: https://cdn.pretix.cloud "
+                "https://matomo.rami.io https://pretix.eu https://static.pretix.cloud https://support.rami.io; "
+                "font-src 'self' https://pretix.eu https://static.pretix.cloud; media-src 'self' data: "
+                "https://cdn.pretix.cloud https://pretix.eu https://static.pretix.cloud; form-action 'self' "
+                "https: https://pretix.eu")
+    h = _parse_csp(prod_csp)
+    _merge_csp(h, _parse_csp(prod_csp))
+    assert _render_csp(h) == prod_csp
+
+
+def test_sanitize_csp():
+    from pretix.base.middleware import _render_csp
+
+    h = {
+        'style-src': ["'self'", "https://example.com", "https://example.org https://attack.example.net", "https://\fexample.org",
+                      "https://\texample.org", "https://example.org;script-src https://example.org", ],
+        'script-src': ["'self'"],
+    }
+    assert _render_csp(h) == (
+        "style-src 'self' https://example.com; script-src 'self'"
+    )

src/tests/control/test_organizer.py

@@ -159,6 +159,22 @@ class OrganizerTest(SoupTest):
         self.orga1.settings.flush()
         assert "mail_from" not in self.orga1.settings._cache()
 
+    @staticmethod
+    def _fake_dmarc_record(hostname):
+        return {
+            'test.pretix.dev': 'v=DMARC1; p=quarantine; sp=none; adkim=r; aspf=r;',
+            'bad.pretix.dev': 'BLA',
+            'none.pretix.dev': None,
+        }[hostname]
+
+    @staticmethod
+    def _fake_cname_record(hostname):
+        return {
+            'pretix._domainkey.test.pretix.dev': 'test-pretix-dev.dkim.pretix.eu.',
+            'pretix._domainkey.bad.pretix.dev': 'example.org',
+            'pretix._domainkey.none.pretix.dev': None,
+        }[hostname]
+
     @staticmethod
     def _fake_spf_record(hostname):
         return {
@@ -172,9 +188,17 @@ class OrganizerTest(SoupTest):
             'spftest.pretix.dev': None,
         }[hostname]
 
-    @override_settings(MAIL_CUSTOM_SENDER_VERIFICATION_REQUIRED=False, MAIL_CUSTOM_SENDER_SPF_STRING="include:spftest.pretix.dev include:test2.pretix.dev")
-    def test_email_setup_no_verification_spf_success(self):
+    @override_settings(
+        MAIL_CUSTOM_SENDER_VERIFICATION_REQUIRED=False,
+        MAIL_CUSTOM_SENDER_SPF_STRING="include:spftest.pretix.dev include:test2.pretix.dev",
+        MAIL_CUSTOM_SENDER_DKIM_SELECTOR="pretix",
+        MAIL_CUSTOM_SENDER_DKIM_CNAME="dkim.pretix.eu.",
+        MAIL_CUSTOM_SENDER_DMARC_REQUIRED=True,
+    )
+    def test_email_setup_no_verification_spf_dmarc_dkim_success(self):
         self.monkeypatch.setattr("pretix.control.views.mailsetup.get_spf_record", OrganizerTest._fake_spf_record)
+        self.monkeypatch.setattr("pretix.control.views.mailsetup.get_cname_record", OrganizerTest._fake_cname_record)
+        self.monkeypatch.setattr("pretix.control.views.mailsetup.get_dmarc_record", OrganizerTest._fake_dmarc_record)
         doc = self.post_doc(
             '/control/organizer/%s/settings/email/setup' % self.orga1.slug,
             {
@@ -213,6 +237,43 @@ class OrganizerTest(SoupTest):
         # not yet saved
         assert "mail_from" not in self.orga1.settings._cache()
 
+    @override_settings(MAIL_CUSTOM_SENDER_VERIFICATION_REQUIRED=False,
+                       MAIL_CUSTOM_SENDER_DKIM_SELECTOR="pretix",
+                       MAIL_CUSTOM_SENDER_DKIM_CNAME="dkim.pretix.eu.",
+                       MAIL_CUSTOM_SENDER_SPF_STRING="")
+    def test_email_setup_no_verification_dkim_warning(self):
+        self.monkeypatch.setattr("pretix.control.views.mailsetup.get_cname_record", OrganizerTest._fake_cname_record)
+        doc = self.post_doc(
+            '/control/organizer/%s/settings/email/setup' % self.orga1.slug,
+            {
+                'mode': 'simple',
+                'simple-mail_from': 'test@bad.pretix.dev',
+            },
+            follow=True
+        )
+        assert doc.select('.alert-danger')
+        self.orga1.settings.flush()
+        # not yet saved
+        assert "mail_from" not in self.orga1.settings._cache()
+
+    @override_settings(MAIL_CUSTOM_SENDER_VERIFICATION_REQUIRED=False,
+                       MAIL_CUSTOM_SENDER_DMARC_REQUIRED=True,
+                       MAIL_CUSTOM_SENDER_SPF_STRING="")
+    def test_email_setup_no_verification_dmarc_warning(self):
+        self.monkeypatch.setattr("pretix.control.views.mailsetup.get_dmarc_record", OrganizerTest._fake_dmarc_record)
+        doc = self.post_doc(
+            '/control/organizer/%s/settings/email/setup' % self.orga1.slug,
+            {
+                'mode': 'simple',
+                'simple-mail_from': 'test@bad.pretix.dev',
+            },
+            follow=True
+        )
+        assert doc.select('.alert-danger')
+        self.orga1.settings.flush()
+        # not yet saved
+        assert "mail_from" not in self.orga1.settings._cache()
+
     def test_email_setup_smtp(self):
         self.monkeypatch.setattr("pretix.base.email.test_custom_smtp_backend", lambda b, a: None)
         self.monkeypatch.setattr("socket.gethostbyname", lambda h: "8.8.8.8")