The Happy Addons for Elementor WordPress plugin before 2.24.0, Happy Addons Pro for Elementor WordPress plugin before 1.17.0 have a number of widgets that are vulnerable to stored Cross-Site Scripting(XSS) by lower-privileged users such as contributors, all via a similar method: The �??Card�?� widget accepts a �??title_tag�?� parameter. Although the element control lists a fixed set of possible html tags, it is possible to send a �??save_builder�?? request with the �??heading_tag�?� set to �??script�?�, and the actual �??title�?� parameter set to JavaScript to be executed within the script tags added by the �??heading_tag�?� parameter.