Cross-site scripting in widgets with units

Date: 2023-07-25
CVE ID: CVE-2023-36806

Authenticated users can inject malicious code in widgets with units, which is then executed both in the element preview (back end) and on the website (front end).

Thanks to Christian Pöschl and Fabian Brenner from usd AG for reporting this vulnerability.

Affected versions

Contao 4.0
Contao 4.1
Contao 4.2
Contao 4.3
Contao 4.4
Contao 4.5
Contao 4.6
Contao 4.7
Contao 4.8
Contao 4.9 up to 4.9.41
Contao 4.10
Contao 4.11
Contao 4.12
Contao 4.13 up to 4.13.27
Contao 5.0
Contao 5.1 up to 5.1.9

Suggested solution

Upgrade to Contao 4.9.42, 4.13.28 or 5.1.10.

More information

https://github.com/contao/contao/security/advisories/GHSA-4gpr-p634-922x