Opera before 10.63 does not properly verify the origin of video content, which allows remote attackers to obtain sensitive information by using a video stream as HTML5 canvas content.
secunia.com/advisories/41740
securitytracker.com/id?1024570
www.opera.com/docs/changelogs/mac/1063/
www.opera.com/docs/changelogs/unix/1063/
www.opera.com/docs/changelogs/windows/1063/
www.opera.com/support/kb/view/974/
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11937
technet.microsoft.com/library/security/msvr11-002