What security holes? I think the bigger problem here is relying on a media platform to also maintain security protocols. Use authelia or plug some other well maintained and hardened security mechanism on top of jellyfin. Then put it in front of everything else like the arrs, etc. Its weird to me to just setup jellyfin, make it Internet facing, and believing everything is just gonna be safe and secure with no issue. Frankly id prefer if all these services came without security. Its a royal pain to bypass it for localhost or proxying with something like authelia.