source: https://www.securityfocus.com/bid/18899/info

Webvizyon is prone to an SQL-injection vulnerability because it fails 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/path/SayfalaAltList.asp?ID=-1 UNION ALL SELECT 0,kullaniciadi,sifre FROM uyeler