Multiple vulnerabilities have been reported in Opera, which can be exploited by malicious people to bypass certain security restrictions or conduct spoofing and cross-site scripting attacks.

1) A combination of cross-domain content inclusion being allowed and the manner in which the CSS parser is fault-tolerant when processing content can be exploited to bypass cross-domain checks and obtain sensitive information from a web page in another domain.

2) An error when altering the size of the browser window may cause the wrong part of the URL of a web page to be displayed.

3) An error in the handling of reloads and redirects combined with caching may result in scripts executing in the wrong security context. This can be exploited to spoof the address bar or conduct cross-site scripting attacks.

Successful exploitation of this vulnerability allows manipulating Opera's configuration with minimal user interaction to execute arbitrary code.

4) The HTML5 implementation does not validate the origin of specific canvas elements, which can be exploited to obtain sensitive information stored on a network resource for which the IP address is known.

5) An error when handling invalid URLs may in certain cases be exploited to execute arbitrary script code in the context of another domain if a linked, invalid URL displayed in an error page runs script code.

Successful exploitation of this vulnerability requires that a user interacts with a specially crafted error page.

The vulnerabilities are reported in versions prior to 10.63.

Solution
Update to version 10.63.

Provided and/or discovered by
1) The vendor credits Isaac Dawson.
2) Reported by the vendor.
3) Reported by the vendor.
4) Nirankush Panchbhai, Microsoft Vulnerability Research (MSVR).
5) Reported by the vendor.

Changelog
Further details available to Secunia VIM customers

Original Advisory
Opera:
http://www.opera.com/docs/changelogs/windows/1063/
http://www.opera.com/support/kb/view/971/
http://www.opera.com/support/kb/view/972/
http://www.opera.com/support/kb/view/973/
http://www.opera.com/support/kb/view/974/
http://www.opera.com/support/kb/view/976/

MSVR:
http://www.microsoft.com/technet/security/advisory/msvr11-002.mspx

Deep Links
Links available to Secunia VIM customers