Kubla is a basic Content Management System based on Drupal. Its benefits lie in the fact that it's simple and extensible. The core of the application is just a web interface into an SVN repository. This means that people who are comfortable with other SVN tools can continue to use them, but Kubla can be used as a simple and fast way to edit pages.
User permissions are halfheartedly enforced in Kubla - the real permissions are in your SVN repository. Right now there is no way to synchronize Kubla's permissions with SVN permissions, so only adding accounts that have SVN permissions are something you'll want to be vigilant about or you'll be running into a lot of annoying errors.