The Master Addons for Elementor WordPress plugin before 1.8.5 does not sanitise and escape the error_message parameter before outputting it back in the response of the jltma_restrict_content AJAX action, available to unauthenticated and authenticated users, leading to a Reflected Cross-Site Scripting
https://wpscan.com/vulnerability/df38cc99-da3c-4cc0-b179-1e52e841b883