Update the WordPress Email Tracker plugin to the latest available version (at least 5.2.6).
WPScanTeam discovered and reported this Cross Site Scripting (XSS) vulnerability in WordPress Email Tracker Plugin. This could allow a malicious actor to inject malicious scripts, such as redirects, advertisements, and other HTML payloads into your website which will be executed when guests visit your site. This vulnerability has been fixed in version 5.2.6.
Toggle The Debug Mode via CrossSite Request Forgery (CSRF) vulnerability
Sensitive Information Disclosure vulnerability
CrossSite Request Forgery (CSRF) vulnerabilities leading to single or bulk email entries deletion