Django 1.10 before 1.10.7, 1.9 before 1.9.13, and 1.8 before 1.8.18 relies on user input in some cases to redirect the user to an "on success" URL. The security check for these redirects (namely ``django.utils.http.is_safe_url()``) considered some numeric URLs "safe" when they shouldn't be, aka an open redirect vulnerability. Also, if a developer relies on ``is_safe_url()`` to provide safe redirect targets and puts such a URL into a link, they could suffer from an XSS attack.
https://www.djangoproject.com/weblog/2017/apr/04/security-releases/
https://access.redhat.com/errata/RHSA-2018:2927
https://access.redhat.com/errata/RHSA-2017:3093
https://access.redhat.com/errata/RHSA-2017:1596
https://access.redhat.com/errata/RHSA-2017:1470
https://access.redhat.com/errata/RHSA-2017:1462
https://access.redhat.com/errata/RHSA-2017:1451
https://access.redhat.com/errata/RHSA-2017:1445
http://www.securitytracker.com/id/1038177