{"id":"CVE-2021-35210","aliases":["GHSA-h58v-c6rf-g9f7"],"url":"https://o3.security/vulnerability/CVE-2021-35210","summary":"Cross site scripting in the system log","details":"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.","published":"2021-06-23T11:15:08.170Z","modified":"2026-08-07T17:02:18.620573Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Packagist","name":"contao/core-bundle","fixedVersion":"4.9.16"},{"ecosystem":"Packagist","name":"contao/core-bundle","fixedVersion":"4.11.5"},{"ecosystem":"Packagist","name":"contao/contao","fixedVersion":"4.9.16"},{"ecosystem":"Packagist","name":"contao/contao","fixedVersion":"4.11.5"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://contao.org/en/security-advisories/cross-site-scripting-in-the-system-log-2021.html"},{"type":"ADVISORY","url":"https://github.com/contao/contao/security/advisories/GHSA-h58v-c6rf-g9f7"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T17:02:18.620573Z"}}