Secunia

Some vulnerabilities have been reported in Opera, where one vulnerability has an unknown impact and others can be exploited by malicious people to conduct cross-site scripting attacks and to compromise a user's system.

1) Opera may launch external email or newsgroup clients incorrectly. This can be exploited to execute arbitrary commands by e.g. visiting a malicious website.

Successful exploitation requires that the user has configured an external email or newsgroup client.

2) An error when processing frames from different websites can be exploited to bypass the same-origin policy. This allows to overwrite functions of those frames and to execute arbitrary HTML and script code in a user's browser session in context of other sites.

3) An unspecified error exists in Opera in combination with Adobe Flash Player 9.0.47.0 and earlier on Mac OS X. No further information is currently available.

The vulnerabilities are reported in all versions of Opera for Desktop prior to version 9.24.

Solution
Update to version 9.24.
Further details available in Customer Area

Provided and/or discovered by
1) Michael A. Puls II
2) David Bloom
3) Reported by the vendor.

Changelog
Further details available in Customer Area

Original Advisory
1) http://www.opera.com/support/search/view/866/
2) http://www.opera.com/support/search/view/867/
3) http://www.opera.com/support/search/view/868/

Other references
Further details available in Customer Area

Deep Links
Links available in Customer Area