After checking our server logs we have noticed that multiple attempts have been made to exploit our hosting accounts using Cross-site Scripting (XSS) type of attack using the CGI-BIN.
The attacker attempts to modify the server settings by running multiple commands directly at the CGI-BIN.
To prevent this type of attack check out the OWASP XSS Prevention Cheat Sheet. To improve your website security you can disable CGI-BIN access if you operate a hosting / reseller account from the Web Host Manager (WHM).
For additional help please visit some of these resources.