CVE-2022-23504

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in TYPO3 Core ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen und einen Denial of Service Zustand herzustellen.

> ### CVSS: `CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:L/E:F/RL:O/RC:C` (5.3) ### Problem Due to the lack of handling user-submitted [YAML placeholder expressions](https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/Configuration/Yaml/YamlApi.html#custom-placeholder-processing) 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. ### Solution Update to TYPO3 versions 9.5.38 ELTS, 10.4.33, 11.5.20, 12.1.1 that fix the problem described above. ### Credits Thanks to TYPO3 core & security team member Oliver Hader who reported and fixed the issue. ### References * [TYPO3-CORE-SA-2022-016](https://typo3.org/security/advisory/typo3-core-sa-2022-016)

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.