TYPO3-SA-2010-009: Vulnerabilitiy in extension Frontend User Registration (sr_feuser_register)

It has been discovered that the extension Frontend User Registration (sr_feuser_register) is susceptible to Cross Site Scripting (XSS) attacks.

Component Type: Third party extension. This extensions is not part of the TYPO3 default installation.

Affected Versions: Version 2.5.24 and all versions below.

Vulnerability Type: Cross Site Scripting

Severity: Medium

Suggested CVSS v2.0: AV:N/AC:M/Au:N/C:P/I:P/A:N/E:U/RL:OF/RC:C (What's that?)

Release Date: 14.04.2010

Problem Description: Failing to validate and sanitize user input the extension is susceptible to Cross Site Scripting (XSS), making it possible to execute arbitrary JavaScript.

Solution: Updated versions are available from the TYPO3 extension manager.

Users are advised to upgrade to extension version 2.5.25 which is available at http://typo3.org/extensions/repository/view/sr_feuser_register/2.5.25/

General advice: Follow the recommendations that are given in the TYPO3 Security Cookbook. Please subscribe to the typo3-announce mailing list to receive future Security Bulletins via E-mail.

Credits: Credits go to Chris John Riley, who discovered and reported the issue.