XSS in Contao
CVE-2025-29790
Contao is an Open Source CMS. Users can upload SVG files with malicious code, which is then executed in the back end and/or front end. This vulnerability is fixed in Contao 4.13.54, 5.3.30, or 5.5.6.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (11.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Contao — versions >= 4.0.0, < 4.13.54, >= 5.0.0, < 5.3.30, >= 5.4.0, < 5.5.6
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
- security-advisories@github.com (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-29790?
- CVE-2025-29790 is a medium-severity vulnerability in Contao, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-03-18.
- How severe is CVE-2025-29790?
- Medium severity. CVSS v3 base score is 5.4 out of 10.