GHSA-6qjf-7g3j-qx25 Neos CMS Cross Site Scripting vulnerability

• Packagist neos/media-browser: < 7.3.19 → fixed in 7.3.19 • Packagist neos/media-browser: >= 8.0.0, < 8.0.16 → fixed in 8.0.16 • Packagist neos/media-browser: >= 8.1.0, < 8.1.11 → fixed in 8.1.11 • Packagist neos/media-browser: >= 8.2.0, < 8.2.11 → fixed in 8.2.11 • Packagist neos/media-browser: >= 8.3.0, < 8.3.9 → fixed in 8.3.9

Cross Site Scripting (XSS) vulnerability in Neos CMS 8.3.3 allows a remote authenticated attacker to execute arbitrary code via a crafted SVG file uploaded to the `neos/management/media` component. To make use of this attack vector, the attacker must either be able to upload a maliciously crafted file or coerce someone with the needed access to upload said file to Neos. Even if such a file is uploaded and subsequently delivered, it is possible to use CSP to protect against attacks being executed from such a file.