CVE-2025-65960: contao — Fix

Description

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, back end users with precise control over the contents of template closures can execute arbitrary PHP functions that do not have required parameters. This issue has been patched in versions 4.13.57, 5.3.42, and 5.6.5. A workaround for this issue involves manually patching the Contao\Template::once() method.

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CVSS v3.1 Score

6.6

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-351 CWE-351

Affected Products

Vendor	Product	Versions
contao	contao	4.0.0 — 4.13.57
contao	contao	5.0.0 — 5.3.42
contao	contao	5.4.0 — 5.6.5

References

Advisories & Patches

https://contao.org/en/security-advisories/remote-code-execution-in-template-closures https://github.com/contao/contao/security/advisories/GHSA-98vj-mm79-v77r

Frequently Asked Questions

What is CVE-2025-65960? +

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, back end users with precise control over the contents of template closures can execute arbitrary PHP functions that do not have required parameters. This issue has been patched in versions 4.13.57, 5.3.42, and 5.6.5. A workaround for this issue involves manually patching the Contao\Template::once() method. It has a CVSS v3.1 base score of 6.6 (MEDIUM).

How severe is CVE-2025-65960? +

CVE-2025-65960 has a CVSS v3.1 score of 6.6 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-65960? +

CVE-2025-65960 affects products from contao, specifically: contao. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-65960? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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