It has been discovered that the extension "Front End User Registration" (sr_feuser_register) is vulnerable to information disclosure
Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
Affected Versions: Version 2.6.1 and below
Vulnerability Type: Information disclosure
Suggested CVSS v2.0: AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:OF/RC:C (What's that?)
Release Date: February 23, 2012
Problem Description: In the edit perspective, the password of frontend users is delivered in plaintext. The autologin feature uses a GET redirect which includes username and password.
Solution: An updated version 2.6.2 is available from the TYPO3 extension manager and attypo3.org/extensions/repository/view/sr_feuser_register/2.6.2/. Users of the extension are advised to update the extension.
Credits: Credits go to Christian Boltz and Security Team Member Franz G. Jahn who discovered and reported this issue.
General advice: Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list to receive future Security Bulletins via E-mail.