CVE-2026-61456

Medium

Description

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.

SeverityMedium

CVSS4.6

Exploit probability—

Product

Grav

PublishedJul 10, 2026

First seenJul 10, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

getgrav grav1.0.3 or later

Vendor advisories

github.com/getgrav/grav/security/advisories/GHSA-7vhm-8x52-2r5p

Affected products

Product	Affected versions	Fixed in
getgrav grav	v < 1.0.3	1.0.3

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.