Bumblebee HP ALM Plugin 4.1.5 and earlier stores credentials unencrypted in its global configuration file com.agiletestware.bumblebee.BumblebeeGlobalConfig.xml
on the Jenkins controller as part of its configuration.
These credentials can be viewed by users with access to the Jenkins controller file system.
Bumblebee HP ALM Plugin 4.1.6 stores credentials encrypted once its configuration is saved again.