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CVE-2025-29790

Contao allows cross-site scripting through SVG uploads

MEDIUM
5.4
CVSS Score
Published: March 18, 2025 at 06:36 PM UTC
Updated: June 17, 2026 at 09:05 AM UTC
1 product affected across 1 vendorContao

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Contao· Contao
95%
v < 4.13.54v < 5.3.30v < 5.5.64.0.0 ≤ v < 4.13.535.0.0 ≤ v < 5.3.305.4.0 ≤ v < 5.5.6
Affected range stops below 4.13.54, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.3.30, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.5.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://contao.org/en/security-advisories/cross-site-scripting-through-svg-uploads
x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/contao/contao/security/advisories/GHSA-vqqr-fgmh-f626

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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