PHD Help Desk SQL Injection vulnerability

Summary
This host is installed with PHD Help Desk and is prone to SQL injection vulnerability.
Impact
Successful exploitation will allow remote attackers to execute arbitrary SQL commands or execute arbitrary HTML or web script in a user's browser session in context of an affected site. Impact Level: Application
Solution
No solution or patch was made available for at least one year since disclosure of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer release, disable respective features, remove the product or replace the product by another one.
Insight
The application does not validate the 'operador', 'contrasenia', and 'captcha' parameters upon submission to the login.php script.
Affected
PHD Help Desk version 2.12, other versions may also be affected
References