TYPO3 Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability - CVE-2021-32669
TYPO3 is an open source PHP based web content management system. Versions 9.0.0 through 9.5.28 10.0.0 through 10.4.17 and 11.0.0 through 11.3.0 have a cross-site scripting vulnerability. When settings for _backend layouts_ are not properly encoded the corresponding grid view is vulnerable to persistent cross-site scripting. A valid backend user account is needed to exploit this vulnerability. TYPO3 versions 9.5.29 10.4.18 11.3.1 contain a patch for this vulnerability.