Contao is an Open Source CMS. From version 4.0.0 to before 4.13.57, before 5.3.42, and before 5.6.5, it is possible to inject code into the template output that will be executed in the browser in the front end and back end. This issue has been patched in versions 4.13.57, 5.3.42, and 5.6.5. A workaround for this issue involves not using the affected templates or patch them manually.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://contao.org/en/security-advisories/cross-site-scripting-in-templates Vendor Advisory
- https://github.com/contao/contao/security/advisories/GHSA-68q5-78xp-cwwc Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 4.8 · contaoNVD modified 2026-10-18 20:10
Affected (CPE criteria) 1
cpe:2.3:a:contao:contao:*:*:*:*:*:*:*:*