TYPO3 Vulnerability - CVE-2023-38499

TYPO3 is an open source PHP based web content management system. Starting in version 9.4.0 and prior to versions 9.5.42 ELTS 10.4.39 ELTS 11.5.30 and 12.4.4 in multi-site scenarios enumerating the HTTP query parameters id and L allowed out-of-scope access to rendered content in the website frontend. For instance this allowed visitors to access content of an internal site by adding handcrafted query parameters to the URL of a site that was publicly available. TYPO3 versions 9.5.42 ELTS 10.4.39 ELTS 11.5.30 12.4.4 fix the problem.