A vulnerability has been reported in Invision Power Board, which can be exploited by malicious people to conduct script insertion attacks.

Input passed as nested custom BBCodes is not properly sanitised before being stored. This can be exploited to insert intrinsic events with arbitrary JavaScript code, which is executed in a user's browser session in context of an affected site when the malicious data is viewed.

The vulnerability is reported in version 2.3.4 downloaded before 2008-03-13. Other versions may also be affected.

Solution
Update to version 2.3.4 downloaded after 2008-03-12.
Further details available to Secunia VIM customers

Provided and/or discovered by
The vendor credits criticalsecurity.net.

Changelog
Further details available to Secunia VIM customers

Original Advisory
http://forums.invisionpower.com/index.php?showtopic=270637

Deep Links
Links available to Secunia VIM customers