GHSA-vqqr-fgmh-f626 Contao Vulnerable to Cross-Site Scripting (XSS) through SVG uploads

• Packagist contao/core-bundle: >= 4.0.0, < 4.13.54 → fixed in 4.13.54 • Packagist contao/core-bundle: >= 5.3.0, < 5.3.30 → fixed in 5.3.30 • Packagist contao/core-bundle: >= 5.4.0, < 5.5.6 → fixed in 5.5.6

Impact Users can upload SVG files with malicious code, which is then executed in the back end and/or front end. Patches Update to Contao 4.13.54, 5.3.30 or 5.5.6. Workarounds Remove `svg,svgz` from the allowed upload file types in the system settings and from `contao.editable_files` in the `config.yaml`. References https://contao.org/en/security-advisories/cross-site-scripting-through-svg-uploads For more information If you have any questions or comments about this advisory, open an issue in contao/contao.