For example, the slippery slope concern is a proper brake on public policy when a given policy seeking to curb a specific, discreet problem would have a likelihood of curbing similar behavior that is in fact not a problem, and indeed, behavior that might be of value to the society.
While the definition is ever expanding, cross script scripting (XSS) attacks are generally considered a type of injection problem where malicious input is injected into an otherwise trusted web page causing an unexpected behavior such as sending data to or from an unknown third party web site (cross site).