source: https://www.securityfocus.com/bid/27589/info

Simple OS CMS is prone to an SQL-injection vulnerability because it fails to adequately sanitize user-supplied data.

A successful exploit may allow an attacker to compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database.

Simple OS CMS 0.1c beta is vulnerable; other versions may also be affected. 

The following exploit information is available:

Passing:

username: admin' or 1=1/*
password: something


will bypass the authentication process.