GHSA-XVHC-GM7J-MHMC Shopware: Stored XSS via SVG file upload — no SVG sanitization

SVG files are in the allowedextensions whitelist and can be uploaded by any admin user via the media manager. There is zero SVG content sanitization anywhere in the upload pipeline. A malicious SVG with JavaScript onload, , executes in the context of the Shopware domain when accessed. The Problem...