PT-2026-57199 · Getgrav · Grav

Alienkeric · Published 2026-07-10 · Updated 2026-07-10 · CVE-2026-61456

NVD

CVSS v3.1

4.6

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

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 /), the embedded script executes in their session context, enabling cookie theft and session hijacking.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-61456

Affected Products

Grav

References · 3

• 🔥 https://github.com/getgrav/grav/security/advisories/GHSA-7vhm-8x52-2r5p · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-61456 · Security Note
• https://vulncheck.com/advisories/grav-before-stored-xss-via-svg-upload-api · Note