Django 1.4 before 1.4.13, 1.5 before 1.5.8, 1.6 before 1.6.5, and 1.7 before 1.7b4 does not properly include the (1) Vary: Cookie or (2) Cache-Control header in responses, which allows remote attackers to obtain sensitive information or poison the cache via a request from certain browsers.
https://www.djangoproject.com/weblog/2014/may/14/security-releases-issued/
http://www.openwall.com/lists/oss-security/2014/05/15/3
http://www.openwall.com/lists/oss-security/2014/05/14/10
http://www.debian.org/security/2014/dsa-2934
http://ubuntu.com/usn/usn-2212-1
http://secunia.com/advisories/61281
http://lists.opensuse.org/opensuse-updates/2014-09/msg00023.html