I found a trove of Computer Science Masters thesis unprotected on a respected uni's website
If you feel it's incorrect for them to share the links in public, you could contact the webmaster and question their process. They possibly should disable the file listing at the directory.

Nevertheless, it's possible that for some universities access to theses is provided free of charge for other researchers to access, and you probably found the location where all of them are stored.

I don't think access should be disabled to the files individually, but indeed it is my opinion that the file directory listing should be private. They probably have a website with descriptions somewhere else, that link to the files.