| Package | Affected versions | Patched versions |
|---|---|---|
| contao/core-bundle | ≥ 4.0.0, < 4.13.54≥ 5.3.0, < 5.3.30≥ 5.4.0, < 5.5.6 | 4.13.545.3.305.5.6 |
| contao | ≥ 4.0.0, < 4.13.53≥ 5.0.0, < 5.3.30≥ 5.4.0, < 5.5.6 | 4.13.535.3.305.5.6 |
Users can upload SVG files with malicious code, which is then executed in the back end and/or front end.
Update to Contao 4.13.54, 5.3.30 or 5.5.6.
Remove svg,svgz from the allowed upload file types in the system settings and from contao.editable_files in the config.yaml.
https://contao.org/en/security-advisories/cross-site-scripting-through-svg-uploads
If you have any questions or comments about this advisory, open an issue in contao/contao.
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