Mozilla Firefox 4.x through 7.0 and Thunderbird 5.0 through 7.0 perform access control without checking for use of the NoWaiverWrapper wrapper, which allows remote attackers to gain privileges via a crafted web site.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14202
https://bugzilla.mozilla.org/show_bug.cgi?id=672182
http://www.mozilla.org/security/announce/2011/mfsa2011-52.html
http://secunia.com/advisories/49055
http://lists.opensuse.org/opensuse-security-announce/2011-11/msg00020.html