source: https://www.securityfocus.com/bid/17912/info
EDirectoryPro is prone to an SQL-injection vulnerability. This issue is due to a failure in the application to properly sanitize user-supplied input before using it in an SQL query.
A successful exploit could allow an attacker to compromise the application, access or modify data, or exploit vulnerabilities in the underlying database implementation.
http://www.example.com/linkdirectory/search_result.asp?Category=2&keyword=%27+or+%27%3D%27&mode=date