Some vulnerabilities have been reported in Opera, which can be exploited by malicious people to disclose sensitive information, conduct spoofing attacks, or compromise a user's system.

1) An error when processing domain names can be exploited to cause a memory corruption.

Successful exploitation may allow execution of arbitrary code.

2) An error when running scripts on the feed subscription page can be exploited to disclose feed information or automatically subscribe to a feed.

3) An error when processing web fonts on Windows can be exploited to change the font of the address field and display an arbitrary domain name as an address.

The vulnerabilities are reported in versions prior to 10.01.

Solution
Update to version 10.01.

Provided and/or discovered by
1) The vendor credits Chris Weber of Casaba Security.
2) Inferno
3) The vendor credits John Daggett.

Changelog
Further details available to Secunia VIM customers

Original Advisory
Opera:
http://www.opera.com/support/kb/view/938/
http://www.opera.com/support/kb/view/939/
http://www.opera.com/support/kb/view/940/

Inferno:
http://securethoughts.com/2009/10/hijacking-operas-native-page-using-malicious-rss-payloads/

Deep Links
Links available to Secunia VIM customers