CVE-2019-12766
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.
Date published : 2019-06-11
http://www.securityfocus.com/bid/108735
https://developer.joomla.org/security-centre/784-20190602-core-xss-in-subform-field