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.
https://technet.microsoft.com/library/security/msvr11-002
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11937
http://www.opera.com/support/kb/view/974/
http://www.opera.com/docs/changelogs/windows/1063/
http://www.opera.com/docs/changelogs/unix/1063/
http://www.opera.com/docs/changelogs/mac/1063/