Probably has a login plugin to replace the standard login.
Can you get access to the sources on the host?
At worst case, there really isn’t that much content, and you could recreate much of it by looking at the HTML view in the browser, copy the html in the <content> section, and paste that into the HTML editor view, and end up with most of your content. Would have to download the images and re-add them as well. But as long as you can still veiw the site, all is not lost.