The login form in Bugzilla 2.x, 3.x, 4.x before 4.4.3, and 4.5.x before 4.5.3 does not properly handle a correctly authenticated but unintended login attempt, which makes it easier for remote authenticated users to obtain sensitive information by arranging for a victim to login to the attacker's account and then submit a vulnerability report, related to a "login CSRF" issue.
https://bugzilla.mozilla.org/show_bug.cgi?id=713926
http://www.securitytracker.com/id/1030128
http://www.bugzilla.org/security/4.0.11/
http://lists.fedoraproject.org/pipermail/package-announce/2014-April/132309.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-April/132281.html