Update the WordPress amCharts: Charts and Maps plugin to the latest available version (at least 1.4.1).
thiennv discovered and reported this Cross Site Scripting (XSS) vulnerability in WordPress amCharts: Charts and Maps 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 1.4.1.