Merge pull request #1382 from apa-1/master

Fix next redirect if only one / exists

gluon/tools.py

@@ -1918,10 +1918,12 @@ class Auth(object):
         if isinstance(next, (list, tuple)):
             next = next[0]
         if next and self.settings.prevent_open_redirect_attacks:
-            # Prevent an attacker from adding an arbitrary url after the
+            # Prevent an attacker from adding an arbitrary url after the _next variable in the request.
-            # _next variable in the request.
+            # Browsers will fix a single / so check multiple things just in case
-            items = next.split('/')
+            items = filter(None, next.split('/'))
-            if '//' in next and items[2] != current.request.env.http_host:
+            has_url = any(x in next for x in ['//', ':', 'ftp', 'http', 'rss', 'xml'])
+            if has_url and len(items) > 1:
+                if items[1] != current.request.env.http_host:
                     next = None
         return next