Here you will find a list of vulnerabilities that have already been found and fixed in Contao. If you think that you have found a security issue in Contao, please report it according to our security policy.
Privilege escalation with the form generator
CVE ID: CVE-2021-37627
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.
Contao 4.4 up to 4.4.55
Contao 4.9 up to 4.9.17
Contao 4.11 up to 4.11.6
Update to Contao 4.4.56, 4.9.18 or 4.11.7.
Disable the form generator or disable the login for untrusted back end users.