Remote Code Execution Vulnerability in Contao CMS by Contao
CVE-2025-65960

6.6MEDIUM

Key Information:

Vendor

Contao

Status
Contao
Vendor
CVE Published:
25 November 2025

What is CVE-2025-65960?

An open-source content management system, Contao, is susceptible to a remote code execution issue that enables backend users to execute arbitrary PHP functions without the necessary parameters if they have precise control over the contents of template closures. This vulnerability affects versions ranging from 4.0.0 up to just before 4.13.57, 5.3.42, and 5.6.5. To mitigate this risk, users are encouraged to upgrade to the patched versions or consider manually patching the Contao\Template::once() method as a temporary workaround.

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Deploy the Patch

Affected Version(s)

contao >= 4.0.0, < 4.13.57 < 4.0.0, 4.13.57

contao >= 5.0.0-RC1, < 5.3.42 < 5.0.0-RC1, 5.3.42

contao >= 5.4.0-RC1, < 5.6.5 < 5.4.0-RC1, 5.6.5

References

https://github.com/contao/contao/security/advisories/GHSA...
x_refsource_CONFIRM
https://contao.org/en/security-advisories/remote-code-exe...
x_refsource_MISC

CVSS V3.1

Score:
6.6
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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