If you don't find anyway to change the password in CJ.com, you can try to contact CJ staff for the password changing.
Yes, go to Account >> Administrative Settings Scroll down to user settings and click on the 'Edit' link to the right of your name. You will get a popup. Log in and you can change your password.
Account -->> Administrative Settings -->> user settings -->> click on the 'Edit' link to the right of your name.