How do I import maps onto my minecraft server?

I have a server that is hosted by Minehut (a server that hosts other servers inside of, great community) and with it, I can't edit much of my server files, including the world. So is there any way I could import a custom world without editing the server files?

A basic Google Search linked me to their store: http://store.minehut.com/

According to their 4th Tier plan, they offer a plugin for importing worlds called Scaffold.

As a general question, it is impossible to import worlds in Minecraft when you do not have access to the server files. This is simply because you need to migrate the world files into the /world folder, which you can't do if you don't have access.