CVE-2022-23504: TYPO3

Medium severity, CVSS 4.9. EPSS: 0.5% chance of exploitation in the next 30 days.

TYPO3 is an open source PHP based web content management system. Versions prior to 9.5.38, 10.4.33, 11.5.20, and 12.1.1 are subject to Sensitive Information Disclosure. Due to the lack of handling user-submitted YAML placeholder expressions in the site configuration backend module, attackers could expose sensitive internal information, such as system configuration or HTTP request messages of other website visitors. A valid backend user account having administrator privileges is needed to exploit this vulnerability. This issue has been patched in versions 9.5.38 ELTS, 10.4.33, 11.5.20, 12.1.1.

Affected products

• TYPO3 TYPO3: from 9.0.0, before 9.5.38 (fixed in 9.5.38); from 10.0.0, before 10.4.33 (fixed in 10.4.33); from 11.0.0, before 11.5.20 (fixed in 11.5.20); from 12.0.0, before 12.1.1 (fixed in 12.1.1)

Published 2022-12-14. Last modified 2026-06-17.