What is Cross Site Tracing (XST)? How can it be prevented? Technology Community › Category: Web Security › What is Cross Site Tracing (XST)? How can it be prevented? 0 Vote Up Vote Down VietMX Staff asked 4 years ago By using XST technique, attackers are able to steal cookies by bypassing “http only” attribute. XST technique can be prevented by disabling TRACE method on the web server.