source: https://www.securityfocus.com/bid/35572/info Google Chrome is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input. An attacker can exploit this issue to execute arbitrary script code in the context of the user running the application and to steal cookie-based authentication credentials and other sensitive data that may aid in further attacks. Chrome 1.0.154.48 is vulnerable; other versions may also be affected. With request to script at web site: http://www.example.com/script.php?param=javascript:alert(document.cookie) Which returns in answer the refresh header: refresh: 0; URL=javascript:alert(document.cookie)