TYPO3 is an enterprise content management system. Starting in version 9.0.0 and prior to versions 9.5.48 ELTS, 10.4.45 ELTS, 11.5.37 LTS, 12.4.15 LTS, and 13.1.1, the form manager backend module is vulnerable to cross-site scripting. Exploiting this vulnerability requires a valid backend user account with access to the form module. TYPO3 versions 9.5.48 ELTS, 10.4.45 ELTS, 11.5.37 LTS, 12.4.15 LTS, and 13.1.1 fix the problem described.
https://typo3.org/security/advisory/typo3-core-sa-2024-008
https://github.com/TYPO3/typo3/security/advisories/GHSA-v6mw-h7w6-59w3
https://github.com/TYPO3/typo3/commit/e95a1224719efafb9cab2d85964f240fd0356e64
https://github.com/TYPO3/typo3/commit/d0393a879a32fb4e3569acad6bdb5cda776be1e5
https://github.com/TYPO3/typo3/commit/2832e2f51f929aeddb5de7d667538a33ceda8156