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GHSA-v24p-7p4j-qvvfmedium5.4

Contao: Cross site scripting in the file manager

Impact

Users can insert malicious code into file names when uploading files, which is then executed in tooltips and popups in the backend.

Source excerpt · OSV

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

contao/core-bundle Packagist
Affected rangeRecorded fix
From 4.0.0 before 4.13.40Ecosystem versions4.13.40
From 5.0.0-RC1 before 5.3.4Ecosystem versions5.3.4

Version evidence: OSV · GHSA-v24p-7p4j-qvvf

View original version evidence (332 explicit versions)

Original source description

Impact

Users can insert malicious code into file names when uploading files, which is then executed in tooltips and popups in the backend.

Patches

Update to Contao 4.13.40 or Contao 5.3.4.

Workarounds

Disable uploads for untrusted users.

References

https://contao.org/en/security-advisories/cross-site-scripting-in-the-file-manager

For more information

If you have any questions or comments about this advisory, open an issue in contao/contao.

Credits

Thanks to Alexander Wuttke for reporting this vulnerability.

References