In Joomla! before 3.9.19, incorrect input validation of the module tag option in com_modules allows XSS.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Link | Tags |
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https://developer.joomla.org/security-centre/815-20200603-core-xss-in-com-modules-tag-options | vendor advisory |