MCLogin System "myusername" SQL Injection Vulnerability
Description
A vulnerability has been discovered in MCLogin System, which can be exploited by malicious people to conduct SQL injection attacks.
Input passed via the "myusername" parameter to login_index.php (when "action" is set to "do_login") is not properly sanitised before being used in SQL queries in class/login_class.php. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.
The vulnerability is confirmed in version 1.2. Other versions may also be affected.
Vulnerable Products
Vulnerable Software: MCLogin System 1.x
Solution
Edit the source code to ensure that input is properly sanitised.