
130 Chapter 4 • Vulnerable CGI Scripts
process bids, and process user logons to display a personal Web page of
purchases and items being watched during the bidding process.This is
similar to other sites that use CGI programs to provide shopping carts,
CGI programs that keep track of items a user has selected to buy. Once
the users decide to stop shopping, these customers use another CGI
script to “check out” and purchase the items.
While sites such as eBay and e-commerce sites may use more com-
plex CGI scripts and programs for making transactions, there are also a
number of other common uses for CGI on the Web, including counters,
which show the number ...