CVE-2026-21629: Joomla!

High severity, CVSS 7.3. EPSS: 0.2% chance of exploitation in the next 30 days.

The ajax component was excluded from the default logged-in-user check in the administrative area. This behavior was potentially unexpected by 3rd party developers.

Affected products

• Joomla! Joomla!: from 3.0.0, before 5.4.4 (fixed in 5.4.4); from 6.0.0, before 6.0.4 (fixed in 6.0.4)

Published 2026-04-01. Last modified 2026-06-17.