TYPO3 Uncontrolled Recursion Vulnerability - CVE-2022-23500

TYPO3 is an open source PHP based web content management system. In versions prior to 9.5.38 10.4.33 11.5.20 and 12.1.1 requesting invalid or non-existing resources via HTTP triggers the page error handler which again could retrieve content to be shown as an error message from another page. This leads to a scenario in which the application is calling itself recursively - amplifying the impact of the initial attack until the limits of the web server are exceeded. This vulnerability is very similar but not identical to the one described in CVE-2021-21359. This issue is patched in versions 9.5.38 ELTS 10.4.33 11.5.20 or 12.1.1.