The absolute worst thing I can see in there is that an third party who somehow managed to get a link to one of your library items (either directly from you or from one of your users--or by spending the next decade bruteforcing it I guess) could stream said item:
https://github.com/jellyfin/jellyfin/issues/5415#issuecommen...
Everything else looks to me like unimportant issues, that would provide someone who's already logged in as a user minor details about your server.
The absolute worst thing I can see in there is that an third party who somehow managed to get a link to one of your library items (either directly from you or from one of your users--or by spending the next decade bruteforcing it I guess) could stream said item: https://github.com/jellyfin/jellyfin/issues/5415#issuecommen...
Everything else looks to me like unimportant issues, that would provide someone who's already logged in as a user minor details about your server.