XSRF

X(cross) Site Request Forgery

This is a combination of an XSS attack and a CSRF attack. Typically the XSS contains code which would manipulate the user's browser in the context of an authenticated session with the actual appropriate http referrer in the HTTP request. This will bypass many form validation techniques. The XSS is usually just something small, e.g. a script tag to include a javascript file with an automated form submission.

See CSRF and XSS for more information.

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