Cross-site scripting (XSS) vulnerability in Opera before 10.54 on Windows and Mac OS X, and before 10.11 on UNIX platforms, allows remote attackers to inject arbitrary web script or HTML via a data: URI, related to incorrect detection of the "opening site."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11362
https://exchange.xforce.ibmcloud.com/vulnerabilities/60646
http://www.vupen.com/english/advisories/2010/1529
http://www.securityfocus.com/bid/40973
http://www.opera.com/support/kb/view/955/
http://www.opera.com/docs/changelogs/windows/1054/
http://www.opera.com/docs/changelogs/unix/1011/