Impact

It is possible for untrusted users to gain administrator rights with the form generator.

Installations are only affected if there are untrusted back end users with access to the form generator.

Patches

Update to Contao 4.4.56, 4.9.18 or 4.11.7.

Workarounds

Disable the form generator or disable the login for untrusted back end users.

References

https://contao.org/en/security-advisories/privilege-escalation-with-the-form-generator

For more information

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

References

• GHSA-hq5m-mqmx-fw6m
• https://nvd.nist.gov/vuln/detail/CVE-2021-37627
• https://contao.org/en/security-advisories/privilege-escalation-with-the-form-generator.html
• https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/contao/CVE-2021-37627.yaml
• https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/core-bundle/CVE-2021-37627.yaml