source: https://www.securityfocus.com/bid/9693/info

It has been reported that WebStores2000 is prone to a cross-site scripting vulnerability. This issue is reportedly due to a failure to sanitize user input and so allow HTML and script code that may facilitate cross-site scripting attacks. 

http://www.example.com/error.asp?Message_id=35<script>alert(document.cookie)</script>