Cross-site tracing

This article needs additional citations for verification. Please help by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Cross-site tracing" – news · newspapers · books · scholar · JSTOR (July 2007) (Learn how and when to remove this message)

In web security, cross-site tracing (abbreviated "XST") is a network security vulnerability exploiting the HTTP TRACE method.

XST scripts exploit ActiveX, Flash, or any other controls that allow executing an HTTP TRACE request. The HTTP TRACE response includes all the HTTP headers including authentication data and HTTP cookie contents, which are then available to the script. In combination with cross domain access flaws in web browsers, the exploit is able to collect the cached credentials of any web site, including those utilizing SSL.

• Cross-site tracing on use Perl.
• Vulnerability Note VU#867593 - Multiple vendors' web servers enable HTTP TRACE method by default
• WhiteHat Security - Whitepaper - Cross-Site Tracing (XST)