CVE-2021-23124: Joomla!

Medium severity, CVSS 6.1. EPSS: 79% chance of exploitation in the next 30 days.

An issue was discovered in Joomla! 3.9.0 through 3.9.23. The lack of escaping in mod_breadcrumbs aria-label attribute allows XSS attacks.

Affected products

• Joomla! Joomla!: from 3.9.0, up to and including 3.9.23

Published 2021-01-12. Last modified 2026-06-17.