source: http://www.securityfocus.com/bid/12904/info

ESMI PayPal Storefrom is affected by a cross-site scripting vulnerability. This issue is due to a failure in the application to properly sanitize user-supplied input.

An attacker may leverage this issue to have arbitrary script code executed in the browser of an unsuspecting user. This may facilitate the theft of cookie-based authentication credentials as well as other attacks. 

http://www.example.com/hv/ecdis/products1h.php?id=%22%3E%3Cscript%3Ealert(document.cookie)%3C/script%3E&id2=10&subcat=Asus&p=products1