It has been discovered that the extension "powermail" (powermail) is vulnerable to Cross-Site Scripting
Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
Affected Versions: Version 1.6.4 and below
Vulnerability Types: Cross-Site Scripting
Release Date: March 28, 2012
Problem Description: Failing to properly sanitize user input, powermail is susceptible to Cross Site Scripting.
Solution: An updated version 1.6.5 is available from the TYPO3 extension manager and attypo3.org/extensions/repository/view/powermail/1.6.5/.
Credits: Thanks to David Henninger, Oliver Meyfarth and Security Team member Markus Bucher who discovered and reported this issue.