By default the Lucee administrator password for the Server and Web contexts are not set. So when you visit the adminstrator for the first time you're asked to choose a password. This is not ideal from a security perspective.

When using CommandBox with commandbox-cfconfig you can set the Server and Web administrator passwords from the commandline.

cfconfig set adminPassword=commandbox // set for current site
cfconfig set adminPasswordDefault=commandbox // set for all new sites

See the CFConfig manual.

Remember you need to save your config with cfconfig export to=.cfconfig.json from the server webroot for CommandBox to automatically import when the server is started.

You can also set server-wide default password. With commandbox-dotenv and commandbox-cfconfig installed just run from the CommandBox command line...

propertyFile set ~/.box.env cfconfig_adminPassword myFavPassword

... and then you will have global environment file which will run for all sites, Lucee or Adobe ColdFusion.