Sift Unity contains a flaw that allows a remote cross site scripting attack.  This flaw exists because the application does not validate the "qt" variable upon submission to the search.cgi 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.

References:

BID: 27684

CVE-2008-0669

OSVDB: 41229  

SECUNIA:28841