Release Date: April 10, 2014
Bulletin update: September 18, 2014 (added CVE)
Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
Affected Versions: powermail: Version 2.0.0 - 2.0.10
Vulnerability Type: Captcha Bypass
Problem Description: The extension powermail offers the use of a captch validation to secure forms. It was possible to bypass the captcha validation and submit forms.
Important Note: Other field validators weren't involved so any other validation worked as expected.
Solution: Updated version 2.0.11 is available from the TYPO3 extension manager and at http://typo3.org/extensions/repository/download/powermail/2.0.11/t3x/. Users of the extension are advised to update the extension as soon as possible as long as they use captchas in their forms.
Credits: Credits go to Jigal van Hemert who discovered and reported this issue.