Release Date: March 24, 2016
Component Type: Third party extension. This extension is not a part of the TYPO3 default installation.
Affected Versions: version 1.4.4 and below
Vulnerability Type: Insecure Authentication and Session Handling
Severity: Medium
Suggested CVSS v2.0: AV:N/AC:M/Au:S/C:P/I:P/A:N/E:F/RL:O/RC:C (What's that?)
Problem Description: Failing to properly invalidate the authentication code after usage or time-based, the extension is vulnerable to Insecure Authentication and Session Handling.
Solution: An updated version 1.4.5 is available from the TYPO3 Extension Manager and at https://typo3.org/extensions/repository/download/ods_ajaxmailsubscription/1.4.5/t3x/. Users of the extension are advised to update the extension as soon as possible.
Note: The new version needs to add some database changes. Old auth codes become invalid once the update was installed!
Credits: Credits go to Sabine Deeken 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.