Update the WordPress Email Tracker plugin to the latest available version (at least 5.2.7).
Vlad Vector discovered and reported this Cross Site Request Forgery (CSRF) vulnerability in WordPress Email Tracker Plugin. This could allow a malicious actor to force higher privileged users to execute unwanted actions under their current authentication. For example a password change which will then allow the malicious actor to login into the admin account. This vulnerability has been fixed in version 5.2.7.
Toggle The Debug Mode via CrossSite Request Forgery (CSRF) vulnerability
Sensitive Information Disclosure vulnerability
Reflected CrossSite Scripting (XSS) vulnerability