CVE-2020-8420: Joomla!

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in Joomla! before 3.9.15. A missing CSRF token check in the LESS compiler of com_templates causes a CSRF vulnerability.

Affected products

• Joomla! Joomla!: from 3.0.0, before 3.9.15 (fixed in 3.9.15)

Published 2020-01-28. Last modified 2026-06-17.