Cross-Site Scripting Vulnerability in Contao CMS
CVE-2025-29790

4.8MEDIUM

Key Information:

Vendor

Contao

Status
Contao
Vendor
CVE Published:
18 March 2025

What is CVE-2025-29790?

Contao, an Open Source Content Management System, has a security flaw that permits users to upload SVG files embedded with malicious code. This malicious code could execute in both the backend and frontend environments, potentially compromising the integrity and security of the website. The issue has been addressed in the latest updates, specifically in versions 4.13.54, 5.3.30, and 5.5.6.

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Deploy the Patch

Affected Version(s)

contao >= 4.0.0, < 4.13.54 < 4.0.0, 4.13.54

contao >= 5.0.0, < 5.3.30 < 5.0.0, 5.3.30

contao >= 5.4.0, < 5.5.6 < 5.4.0, 5.5.6

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 V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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