Vulnerability · Published Nov 25, 2025 · Assigned by GitHub_M

CVE-2025-65960Contao is vulnerable to remote code execution in template closures

Medium 6.6

In plain English

A medium-severity security flaw in contao from contao. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.6Medium

Exploit odds (30 days)0.2%top 91.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	contao/core-bundle	4.13.57	GHSA-98vj-mm79-v77r
Packagist	contao/core-bundle	5.3.42	GHSA-98vj-mm79-v77r
Packagist	contao/core-bundle	5.6.5	GHSA-98vj-mm79-v77r

Affected products (as reported)

Vendor	Product	Versions
contao	contao	>= 4.0.0, < 4.13.57>= 5.0.0-RC1, < 5.3.42>= 5.4.0-RC1, < 5.6.5

Weakness: CWE-351 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

References

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