Description
An issue was discovered in Joomla! 3.0.0 through 3.9.27. Inadequate escaping in the rules field of the JForm API leads to a XSS vulnerability.
Solution(s)
joomla-upgrade-3_9_28
Referenceshttps://attackerkb.com/topics/cve-2021-26035 CVE - 2021-26035 http://developer.joomla.org/security-centre/856-20210701-core-xss-in-jform-rules-field.html