The Coldfusion administrator and RDS password can be reset
by changing the password.properties file located under \cfusionmx\lib\
Before you make any changes make a backup of the file so you can always restore it in it’s original conditions.
Take a look at the file it should look similar to the following :
Let’s make some changes,
Set encrypted to false and enter your new passwords.
Save the file and restart the MX services.