Security advisories

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.

2021

Privilege escalation with the form generator

Date: 2021-08-11
CVE ID: CVE-2021-37627

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

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PHP file inclusion via insert tags

Date: 2021-08-11
CVE ID: CVE-2021-37626

It is possible for untrusted users to load arbitrary PHP files via insert tags.

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Cross site scripting via HTML attributes in the back end

Date: 2021-08-11
CVE ID: CVE-2021-35955

It is possible for untrusted users to inject malicious code into HTML attributes in the back end, which will be executed both in the element preview (back end) and on the website (front end).

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Cross site scripting in the system log

Date: 2021-06-23
CVE ID: CVE-2021-35210

It is possible to inject code into the tl_log table that will be executed in the browser when the system log is called. The problem affects all Contao versions as of Contao 4.5 and has been fixed in Contao 4.9.16 and 4.11.5.

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