CVE-2019-12766: Joomla!

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

An issue was discovered in Joomla! before 3.9.7. The subform fieldtype does not sufficiently filter or validate input of subfields. This leads to XSS attack vectors.

Affected products

• Joomla! Joomla!: from 3.6.0, up to and including 3.9.6

Published 2019-06-11. Last modified 2026-06-17.