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.
Insert tag injection in forms
by Leo Feyer
CVE ID: CVE-2020-25768
It is possible to inject insert tags in front end forms which will be replaced when the page is rendered.
Contao 4.4 up to 4.4.51
Contao 4.9 up to 4.9.5
Contao 4.10 up to 4.10.0
Update to Contao 4.4.52, 4.9.6 or 4.10.1.
Disable the front end login form and do not use form fields with array keys such as