The King Addons for Elementor WordPress plugin before 51.1.77 does not escape a widget display-style setting before outputting it in an HTML attribute, allowing users with Contributor-level access and above to store JavaScript that executes in the browser of any visitor to the affected page, including logged-in administrators.

The King Addons for Elementor WordPress plugin before 51.1.76 does not escape a user-supplied grid setting before reflecting it into an HTML attribute in an unauthenticated AJAX response, allowing attackers to execute arbitrary JavaScript in the browser of a visitor who is tricked into loading a crafted page.

The King Addons for Elementor plugin for WordPress is vulnerable to multiple Contributor+ DOM-Based Stored Cross-Site Scripting vulnerabilities in all versions up to, and including, 51.1.38. This is due to insufficient input sanitization and output escaping across multiple widgets and features. The plugin uses escattr() and escurl() within JavaScript inline event handlers (onclick attributes), which allows HTML entities to be decoded by the DOM, enabling attackers to break out of the JavaScript context. Additionally, several JavaScript files use unsafe DOM manipulation methods (template literals, .html(), and window.location.href with unvalidated URLs) with user-controlled data. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts via Elementor widget settings that execute when a user accesses the injected page or when an administrator previews the page in Elementor's editor. The vulnerability was partially patched in version 5.1.51.

The King Addons for Elementor – Free Elements, Widgets, Templates, and Features for Elementor plugin for WordPress is vulnerable to privilege escalation in versions 24.12.92 to 51.1.14 . This is due to the plugin not properly restricting the roles that users can register with. This makes it possible for unauthenticated attackers to register with administrator-level user accounts.