Contao 4.5.x through 4.9.x before 4.9.16, and 4.10.x through 4.11.x before 4.11.5, allows XSS. It is possible to inject code into the tl_log table that will be executed in the browser when the system log is called in the back end.Referenceshttps://contao.org/en/security-advisories/cross-site-scripting-in-the-system-log-2021.htmlhttps://github.com/contao/contao/security/advisories/GHSA-h58v-c6rf-g9f7
