{"id":"CVE-2026-107848","published":"2026-10-09T21:17:02.617","lastModified":"2026-10-13T12:17:11.947","description":"Contao is an Open Source CMS. From version 4.0.0 until 5.3.50 and 5.7.12, RequestTokenListener validates REQUEST_TOKEN only for POST requests, while the declarative GET guard runs only when an act parameter is present. Backend actions dispatched through the key parameter can therefore execute without a CSRF token when an authenticated backend user loads an attacker-controlled URL. Reachable actions remain limited to modules available to that user, and the advisory demonstrates destructive or state-changing actions rather than privilege escalation. This issue is fixed in versions 5.3.50 and 5.7.12.","cvssScore":3.5,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","cwes":["CWE-352"],"vendors":[],"products":[],"references":[{"url":"https://github.com/contao/contao/commit/34dd27ee6739f10568d3d95d8784862255c925b4","tags":[]},{"url":"https://github.com/contao/contao/releases/tag/5.7.12","tags":[]},{"url":"https://github.com/contao/contao/security/advisories/GHSA-9ff2-p842-45wq","tags":[]}],"exploitRefs":[{"url":"https://github.com/contao/contao/commit/34dd27ee6739f10568d3d95d8784862255c925b4","tags":[]},{"url":"https://github.com/contao/contao/releases/tag/5.7.12","tags":[]},{"url":"https://github.com/contao/contao/security/advisories/GHSA-9ff2-p842-45wq","tags":[]}],"hasPoc":true,"ai":null}