Component Type: TYPO3 CMS
Release Date: November 22, 2016
Vulnerable subcomponent: Backend
Vulnerability Type: Insecure Unserialize
Affected Versions: Versions 6.2.0 to 6.2.28, 7.6.0 to 7.6.12 and 8.0.0 to 8.4.0
Severity: Medium
Suggested CVSS v2.0: AV:N/AC:H/Au:S/C:P/I:P/A:P/E:P/RL:O/RC:C
CVE: not assigned yet
Problem Description: Failing to properly validate incoming data, the suggest wizard is susceptible to insecure unserialize. To exploit this vulnerability a valid backend user account is needed.
Solution: Update to TYPO3 versions 6.2.29, 7.6.13 or 8.4.1 that fix the problem described.
Credits: Thanks to TYPO3 core team member Christian Kuhn who discovered and reported the issue.
General Advice: Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list.
General Note: All security related code changes are tagged so that you can easily look them up on our review system.