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.

Source: CVE-2021-24292

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