How to Change Your cPanel Password
To change your cPanel password, you will first need to login to the Account Management Panel. You should be able to login with your forum account username and password. If you forgot your forum username, you can substitute your email address.
Once logged in, click on View Details in the yellow box. Then, under Change Password, click on Click here to update my password.
You will have to enter your current password and your new password twice for verification.
Remember: This will update your cPanel password and your forum account password.