HTTP Request Smuggling results from the discrepancies in parsing HTTP
						requests between HTTP entities such as web caching proxies or application
						firewalls. Entities such as web servers, web caching proxies, application
						firewalls or simple proxies often parse HTTP requests in slightly different
						ways. Under specific situations where there are two or more such entities in
						the path of the HTTP request, a specially crafted request is seen by two
						attacked entities as two different sets of requests. This allows certain
						requests to be smuggled through to a second entity without the first one
						realizing it.