1 files changed, 11 insertions, 0 deletions
diff --git a/postgresqleu/util/auth.py b/postgresqleu/util/auth.py
index bdb5bd7d..d6a05eba 100644
--- a/postgresqleu/util/auth.py
+++ b/postgresqleu/util/auth.py
@@ -5,10 +5,21 @@ from django.conf import settings
 import urllib.parse
 
 
+PERMISSION_GROUPS = (
+    'Invoice managers',
+    'News administrators',
+    'Membership administrators',
+    'Election administrators',
+)
+
+
 def authenticate_backend_group(request, groupname):
     if not request.user.is_authenticated:
         raise RedirectException("{0}?{1}".format(settings.LOGIN_URL, urllib.parse.urlencode({'next': request.build_absolute_uri()})))
 
+    if groupname not in PERMISSION_GROUPS:
+        raise PermissionDenied("Group name not known")
+
     if request.user.is_superuser:
         return
     if request.user.groups.filter(name=groupname).exists():