Release Date: November 11, 2016
Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
Affected Versions: version 3.1.1 and below
Vulnerability Type: Cross Site-Scripting, SQL Injection
Severity: Medium
Suggested CVSS v2.0: AV:N/AC:M/Au:S/C:P/I:P/A:P/E:F/RL:O/RC:C (What's that?)
Problem Description: Failing to properly escape user input, the extension is susceptible to SQL Injection and Cross-Site Scripting. The vulnerabilities are exploitable only by users having access to the backend module and if at least one newsletter with the enabled option "Register clicked links" exists.
Solution: An updated version 3.1.2 is available from the TYPO3 extension manager and at https://typo3.org/extensions/repository/download/tcdirectmail/3.1.2/t3x/. Users of the extension are advised to update the extension as soon as possible.
Credits: Credits go to Torben Hansen who discovered and reported the vulnerability.
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.