CVE-2024-28234: Contao

Medium severity, CVSS 4.7. EPSS: 0.6% chance of exploitation in the next 30 days.

Contao is an open source content management system. Starting in version 2.0.0 and prior to versions 4.13.40 and 5.3.4, it is possible to inject CSS styles via BBCode in comments. Installations are only affected if BBCode is enabled. Contao versions 4.13.40 and 5.3.4 have a patch for this issue. As a workaround, disable BBCode for comments.

Affected products

• Contao Contao: from 2.0, before 4.13.40 (fixed in 4.13.40); from 5.0.0, before 5.3.4 (fixed in 5.3.4)

Published 2024-04-09. Last modified 2026-06-17.