XcClassified contains a flaw that allows a remote cross site scripting attack. This flaw exists because the application does not validate the 'SearchFor' variable upon submission to the 'CPSearch.asp' script. 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.
Upgrade to version 3.6 or higher, as it has been reported to fix this vulnerability. In addition, XCENT has released a patch for some older versions.