Mozilla Firefox 4.x through 11.0, Firefox ESR 10.x before 10.0.4, Thunderbird 5.0 through 11.0, Thunderbird ESR 10.x before 10.0.4, and SeaMonkey before 2.9 allow remote attackers to spoof the address bar via an https URL for invalid (1) RSS or (2) Atom XML content.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17011
https://exchange.xforce.ibmcloud.com/vulnerabilities/75156
https://bugzilla.mozilla.org/show_bug.cgi?id=714631
http://www.securityfocus.com/bid/53224
http://www.mozilla.org/security/announce/2012/mfsa2012-33.html
http://www.mandriva.com/security/advisories?name=MDVSA-2012:081
http://www.mandriva.com/security/advisories?name=MDVSA-2012:066
http://www.debian.org/security/2012/dsa-2464
http://www.debian.org/security/2012/dsa-2458
http://www.debian.org/security/2012/dsa-2457
http://secunia.com/advisories/49055
http://secunia.com/advisories/49047
http://secunia.com/advisories/48972