Description (CNA)
The Grav API plugin (getgrav/grav-plugin-api) before 1.0.3 fails to sanitize SVG files uploaded through the POST /api/v1/media endpoint. The HandlesMediaUploads::processUploadedFile() method validates only the file extension and never invokes Security::sanitizeSVG(), so an authenticated attacker with the api.media.write permission can upload an SVG containing arbitrary JavaScript. The file is stored unmodified and served with Content-Type: image/svg+xml; when an administrator opens it in a browser (directly or via <object>/<iframe>), the embedded script executes in their session context, enabling cookie theft and session hijacking.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| getgrav / grav | affected 0 before 1.0.3; unaffected 1.0.3 |
CWE
CWE-79
References
- https://github.com/getgrav/grav/security/advisories/GHSA-7vhm-8x52-2r5p
- https://www.vulncheck.com/advisories/grav-before-stored-xss-via-svg-upload-api
ADP enrichment
No English description supplied.