Release Date: March 16, 2010
Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
Affected Versions: Version 1.8.2 and all versions below
Vulnerability Type: Cross-Site Scripting
Problem Description: The TYPO3 extension mm_forum fails to validate user supplied input.
Solution: An updated version 1.8.3 is available from the TYPO3 extension manager and at http://typo3.org/extensions/repository/view/mm_forum/1.8.3/.
Credits: Credits go to Stefanos Karasavvidis, who discovered and reported the issue.