In Pritunl Client before 1.3.4220.57, an administrator with access to /Applications can escalate privileges after uninstalling the product. Specifically, an administrator can insert a new file at the pathname of the removed pritunl-service file. This file then is executed by a LaunchDaemon as root.
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.