Wordpress has become an all-purpose CMS known security vulnerabilities via unsafe plugins.
Ghost has APIs instead of plugins for nearly everything, so it eliminated a lot of security and maintenance headache that way.
Ghost focuses on just a few features centered around independent content creators: blogging, email newsletters and subscriptions.
So features for sending bulk emails and accepting payments are built in, but you won’t find native support for other things like podcasts or recipe markup.
Ghost meets my need, and I love not dealing with 30 plugins at risk of being exploited if I don’t upgrade them promptly.
The requirements asked for a web UI. You are right though, except for that, other kind of shared folder solutions might work.