Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
Affected Versions: Version 1.5.3 and below
Vulnerability Type: Cross-Site Scripting, SQL Injection, Validation Bypass
Release Date: 22.09.2010
Problem Description: Because of improper input validation and output encoding, powermail is susceptible to Cross-Site Scripting and SQL Injection. Additionally it is possible to inject abritrary values into validated fields like "Email" or "URL".
Solution: An updated version 1.5.4 is available from the TYPO3 extension manager and at typo3.org/extensions/repository/view/powermail/1.5.4/. Users of the extension are advised to update the extension as soon as possible.
Credits: Credits go to Cedric Tissieres who discovered and reported the issues.