Multiple cross-site scripting (XSS) vulnerabilities in NetAuctionHelp 3.0 and earlier allow remote attackers to inject arbitrary HTML and web script via the (1) L, (2) sort, (3) category, (4) categoryname parameters to search.asp.
http://www.vupen.com/english/advisories/2005/2761
http://www.securityfocus.com/bid/15737
http://secunia.com/advisories/17902
http://pridels0.blogspot.com/2005/12/netauctionhelp-v30-xss-vuln.html