GHSA-vqqr-fgmh-f626
Contao Vulnerable to Cross-Site Scripting (XSS) through SVG uploads
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | contao/core-bundle | >= 4.0.0, < 4.13.54 | 4.13.54 |
| Packagist | contao/core-bundle | >= 5.3.0, < 5.3.30 | 5.3.30 |
| Packagist | contao/core-bundle | >= 5.4.0, < 5.5.6 | 5.5.6 |
Details
As written in the advisory (Markdown source, shown as plain text).
### 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](https://github.com/contao/contao/issues/new/choose).
References
External links from the advisory. They lead to third-party sites.