CVE-2025-29790

Contao allows cross-site scripting through SVG uploads

4.8 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Active

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: None

Exploit likelihood

0.22%Up 0.2 points since Mar 19, 2025

What each source reports

CVE List Score used 4.8

Contao allows cross-site scripting through SVG uploads

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.

Record: CVE-2025-29790
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2025-6706 4.8

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.

Record: EUVD-2025-6706
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-vqqr-fgmh-f626 4.8

Contao Vulnerable to Cross-Site Scripting (XSS) through SVG uploads

Impact

Users can upload SVG files with malicious code, which is then executed in the back end and/or front end.

Patches

Update to Contao 4.13.54, 5.3.30 or 5.5.6.

Workarounds

Remove svg,svgz from the allowed upload file types in the system settings and from contao.editable_files in the config.yaml.

References

https://contao.org/en/security-advisories/cross-site-scripting-through-svg-uploads

For more information

If you have any questions or comments about this advisory, open an issue in contao/contao.

Record: GHSA-vqqr-fgmh-f626
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness: CWE-79
Updated: 2026-11-02

NVD 4.8

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.

Record: CVE-2025-29790
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSV 4.8

Contao allows cross-site scripting through SVG uploads

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.

Record: CVE-2025-29790
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness: CWE-79
Updated: 2026-11-02

OSVGHSA-vqqr-fgmh-f626 4.8

Contao Vulnerable to Cross-Site Scripting (XSS) through SVG uploads

Impact

Users can upload SVG files with malicious code, which is then executed in the back end and/or front end.

Patches

Update to Contao 4.13.54, 5.3.30 or 5.5.6.

Workarounds

Remove svg,svgz from the allowed upload file types in the system settings and from contao.editable_files in the config.yaml.

References

https://contao.org/en/security-advisories/cross-site-scripting-through-svg-uploads

For more information

If you have any questions or comments about this advisory, open an issue in contao/contao.

Record: GHSA-vqqr-fgmh-f626
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness: CWE-79
Updated: 2026-11-02

Affected products

contao

Affected packages

Affected packages
Package	Affected	Fixed
`contao/core-bundle` Packagist	4.0.0 up to 4.13.54	4.13.54
`contao/core-bundle` Packagist	5.3.0 up to 5.3.30	5.3.30
`contao/core-bundle` Packagist	5.4.0 up to 5.5.6	5.5.6
`contao/core-bundle` Packagist	4.0.0 up to 4.13.54, plus listed versions 4.0.14.0.24.0.34.0.44.1.0 Show 45 moreShow less 4.1.0-RC14.1.0-beta14.1.14.1.24.1.34.10.04.10.0-RC14.10.0-RC24.10.0-RC34.10.0-RC44.10.14.10.24.10.34.10.44.10.54.10.64.10.74.11.04.11.0-RC14.11.0-RC24.11.14.11.24.11.34.11.44.11.54.11.64.11.74.11.84.11.94.12.04.12.0-RC14.12.0-RC24.12.0-RC34.12.14.12.24.12.34.12.44.12.54.12.64.12.74.13.04.13.0-RC14.13.0-RC24.13.0-RC34.13.1	4.13.54
`contao/core-bundle` Packagist	5.3.0 up to 5.3.30, plus listed versions 5.3.15.3.105.3.115.3.125.3.13 Show 24 moreShow less 5.3.145.3.155.3.165.3.175.3.185.3.195.3.25.3.205.3.215.3.225.3.235.3.245.3.255.3.265.3.275.3.285.3.295.3.35.3.45.3.55.3.65.3.75.3.85.3.9	5.3.30
`contao/core-bundle` Packagist	5.4.0 up to 5.5.6, plus listed versions 5.4.15.4.105.4.115.4.125.4.13 Show 19 moreShow less 5.4.145.4.25.4.35.4.45.4.55.4.65.4.75.4.85.4.95.5.05.5.0-RC15.5.0-RC25.5.0-RC35.5.0-RC45.5.15.5.25.5.35.5.45.5.5	5.5.6

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-29790 is a medium vulnerability (CVSS 4.8) in Contao, published March 18, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.22%, the 13th percentile. Fixed in contao/core-bundle 4.13.54.

References

This page doesn't list everything

Left out here: 240 versions. The JSON record has them.