[SECURITY] Use defusedcsv for exports

src/pretix/base/exporters/orderlist.py

@@ -1,9 +1,9 @@
-import csv
 import io
 from collections import OrderedDict
 from decimal import Decimal
 
 import pytz
+from defusedcsv import csv
 from django import forms
 from django.db.models import Sum
 from django.dispatch import receiver

src/pretix/control/views/vouchers.py

@@ -1,6 +1,6 @@
-import csv
 import io
 
+from defusedcsv import csv
 from django.conf import settings
 from django.contrib import messages
 from django.core.urlresolvers import resolve, reverse

src/pretix/plugins/checkinlists/exporters.py

@@ -1,7 +1,7 @@
-import csv
 import io
 from collections import OrderedDict
 
+from defusedcsv import csv
 from django import forms
 from django.db.models.functions import Coalesce
 from django.utils.translation import (

src/requirements/production.txt

@@ -43,3 +43,4 @@ vobject==0.9.*
 pycountry
 django-countries
 pyuca  # for better sorting of country names in django-countries
+defusedcsv>=1.0.1

src/setup.py

@@ -104,7 +104,8 @@ setup(
         'vobject==0.9.*',
         'pycountry',
         'django-countries',
-        'pyuca'
+        'pyuca',
+        'defusedcsv'
     ],
     extras_require={
         'dev': [