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.
Cross site scripting via canonical URL
by Leo Feyer
Date: 2022-05-05
CVE ID: CVE-2022-24899
Description
Untrusted users can inject malicious code into the canonical tag, which is then executed on the web page (front end).
Affected versions
Contao 4.13 up to 4.13.2
Suggested solution
Update to Contao 4.13.3.
Workaround
Disable canonical tags in the root page settings.
More information
https://github.com/contao/contao/security/advisories/GHSA-m8x6-6r63-qvj2
