source: https://www.securityfocus.com/bid/16678/info

MyBB is prone to multiple SQL-injection vulnerabilities. These issues are due to a failure in the application to properly sanitize user-supplied input. 

Successful exploitation can allow an attacker to bypass authentication and gain administrative access to a site, modify data, or exploit vulnerabilities in the underlying database implementation. Other attacks may also be possible. 


MyBB version 1.0.3 is reported to be vulnerable.

http://www.example.com/mybb/private.php?action=do_folders&folder['<strong>sql</strong>]=nomatter
http://www.example.com/mybb/private.php?action=do_folders&folder['<strong>sql</strong>]
http://www.example.com/mybb/private.php?action=do_stuff&delete=1&check['<strong>sql</strong>]