Cross-site Scripting in Contao Open Source CMS
CVE-2025-65961

3.3LOW

Key Information:

Vendor

Contao

Status
Contao
Vendor
CVE Published:
25 November 2025

What is CVE-2025-65961?

Contao, an Open Source Content Management System, is susceptible to cross-site scripting vulnerabilities that allow attackers to inject malicious code into template outputs. This code executes in the browser, affecting both front-end and back-end users. The issue affects versions from 4.0.0 up to but not including 4.13.57, as well as earlier versions of 5.3.42 and 5.6.5. Users are urged to update to the patched versions or implement manual patches on affected templates to mitigate risks.

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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/cross-site-scri...
x_refsource_MISC

CVSS V3.1

Score:
3.3
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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