Headline
GHSA-6frx-j292-c844: TYPO3 Allows Privilege Escalation to System Maintainer
Problem
Administrator-level backend users without system maintainer privileges can escalate their privileges and gain system maintainer access. Exploiting this vulnerability requires a valid administrator account.
Solution
Update to TYPO3 versions 10.4.50 ELTS, 11.5.44 ELTS, 12.4.31 LTS, 13.4.12 LTS that fix the problem described.
Credits
Thanks to Alexander Künzl for reporting this issue, and to TYPO3 core & security team member Oliver Hader for fixing it.
Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.