The administrative interface for Django 1.3.x before 1.3.6, 1.4.x before 1.4.4, and 1.5 before release candidate 2 does not check permissions for the history view, which allows remote authenticated administrators to obtain sensitive object history information.
https://www.djangoproject.com/weblog/2013/feb/19/security/
http://www.debian.org/security/2013/dsa-2634