ECW-shop 5.5 contains a flaw that allows a remote Cross Site Scripting attack. This flaw exists because the application does not validate the "cat" variable upon submission. This could allow a user to create a specially crafted URL that would execute arbitrary code in a user's browser within the trust relationship between the browser and the server, leading to a loss of integrity.
Currently, there are no known upgrades or patches to correct this issue. It is possible to correct the flaw by implementing the following workaround(s): Edit the source code to validate user input