This attack targets the encoding of the URL combined with the encoding of
						the slash characters. An attacker can take advantage of the multiple way of
						encoding an URL and abuse the interpretation of the URL. An URL may contain
						special character that need special syntax handling in order to be
						interpreted. Special characters are represented using a percentage character
						followed by two digits representing the octet code of the original character
						(%HEX-CODE). For instance US-ASCII space character would be represented with
						%20. This is often referred as escaped ending or percent-encoding. Since the
						server decodes the URL from the requests, it may restrict the access to some
						URL paths by validating and filtering out the URL requests it received. An
						attacker will try to craft an URL with a sequence of special characters
						which once interpreted by the server will be equivalent to a forbidden URL.
						It can be difficult to protect against this attack since the URL can contain
						other format of encoding such as UTF-8 encoding, Unicode-encoding,
						etc.