CVE-2022-23501: TYPO3 vulnerable to Improper Authentication in Frontend Login

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-14 · updated 2026-06-17
Weakness: CWE-287

Description

TYPO3 is an open source PHP based web content management system. In versions prior to 8.7.49, 9.5.38, 10.4.33, 11.5.20, and 12.1.1 TYPO3 is vulnerable to Improper Authentication. Restricting frontend login to specific users, organized in different storage folders (partitions), can be bypassed. A potential attacker might use this ambiguity in usernames to get access to a different account - however, credentials must be known to the adversary. This issue is patched in versions 8.7.49 ELTS, 9.5.38 ELTS, 10.4.33, 11.5.20, 12.1.1.

Affected products

typo3: before 8.7.49; from 9.0.0 before 9.5.38; from 10.0.0 before 10.4.33; from 11.0.0 before 11.5.20; from 12.0.0 before 12.1.1 — fixed in 10.4.33, 11.5.20, 12.1.1, 8.7.49, 9.5.38

How to fix

Upgrade to a fixed version: typo3 10.4.33, 11.5.20, 12.1.1, 8.7.49. Check the vendor advisory for mitigations.

References

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