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EUVD-2026-261884

fkie_cve-2025-65961

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.

GHSA-68q5-78xp-cwwc — Contao is vulnerable to cross-site scripting in templates

Affected: Packagist: contao/core-bundle

### Impact

It is possible to inject code into the template output that will be executed in the browser in the front end and back end.

### Patches

Update to Contao 4.13.57, 5.3.42 or 5.6.5.

### Workarounds

Do not use the affected templates or patch them manually.

### Refsources

https://contao.org/en/security-advisories/cross-site-scripting-in-templates

WID-SEC-W-2025-2679 — Contao: Mehrere Schwachstellen

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Contao ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen oder beliebigen Code auszuführen.