The XrayWrapper implementation in Mozilla Firefox before 29.0 and SeaMonkey before 2.26 allows user-assisted remote attackers to bypass intended access restrictions via a crafted web site that is visited in the debugger, leading to unwrapping operations and calls to DOM methods on the unwrapped objects.
https://security.gentoo.org/glsa/201504-01
https://bugzilla.mozilla.org/show_bug.cgi?id=988106
http://www.ubuntu.com/usn/USN-2185-1
http://www.securitytracker.com/id/1030164
http://www.securitytracker.com/id/1030163
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.mozilla.org/security/announce/2014/mfsa2014-47.html
http://secunia.com/advisories/59866
http://lists.opensuse.org/opensuse-updates/2014-05/msg00033.html
http://lists.opensuse.org/opensuse-updates/2014-05/msg00010.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-May/132437.html