Prevent XSS Vulnerability is a free WordPress plugin designed to protect websites from Cross-Site Scripting (XSS) attacks. It specifically addresses two types of XSS vulnerabilities: Reflected XSS and Self-XSS. By scanning URLs for specific harmful parameters, the plugin redirects users to prevent potential attacks. Users can customize the parameters to exclude certain ones they wish to allow, ensuring flexibility in managing security without compromising functionality.

In addition to blocking harmful URLs, the plugin also encodes certain characters to thwart malicious code execution. It automatically escapes HTML characters within the $_GET variable, which is essential for websites that display user-controlled input. Users are advised to thoroughly test their website forms after activation, particularly if using WooCommerce, to ensure that cart and checkout processes remain unaffected.