We have recently experienced a security incident that may potentially involve your Plex account information. We believe the actual impact of this incident is limited; however, action is required from you to ensure your account remains secure.
What happened
An unauthorized third party accessed a limited subset of customer data from one of our databases. While we quickly contained the incident, information that was accessed included emails, usernames, securely hashed passwords and authentication data.
Any account passwords that may have been accessed were securely hashed, in accordance with best practices, meaning they cannot be read by a third party. Out of an abundance of caution, we recommend you take some additional steps to secure your account (see details below). Rest assured that we do not store credit card data on our servers, so this information was not compromised in this incident.
What we’re doing
We’ve already addressed the method that this third party used to gain access to the system, and we’re undergoing additional reviews to ensure that the security of all of our systems is further strengthened to prevent future attacks.
What you must do
If you use a password to sign into Plex: We kindly request that you reset your Plex account password immediately by visiting https://plex.tv/reset. When doing so, there’s a checkbox to “Sign out connected devices after password change,” which we recommend you enable. This will sign you out of all your devices (including any Plex Media Server you own) for your security, and you will then need to sign back in with your new password.
If you use SSO to sign into Plex: We kindly request that you log out of all active sessions by visiting https://plex.tv/security and clicking the button that says ”Sign out of all devices”. This will sign you out of all your devices (including any Plex Media Server you own) for your security, and you will then need to sign back in as normal.
Additional Security Measures You Can Take
We remind you that no one at Plex will ever reach out to you over email to ask for a password or credit card number for payments. For further account protection, we also recommend enabling two-factor authentication on your Plex account if you haven’t already done so.
Lastly, we sincerely apologize for any inconvenience this situation may cause you. We take pride in our security systems, which helped us quickly detect this incident, and we want to assure you that we are working swiftly to prevent potential future incidents from occurring.
For step-by-step instructions on how to reset your password, visit:https://support.plex.tv/articles/account-requires-password-reset
But if you just run it locally an a media server in your home, and you don't expose the service to the internet, that doesn't really matter? Though perhaps more people connect to their Jellyfin instances remotely than I realize.
It matters if someone manages to hide an exploit in jellyfin's codebase, or more likely, a popular plugin. I imagine many folk have permissive outgoing firewall rules, in which case, an exploit could establish connectivity. Whether that eventually leads to privilege escalation on the jellyfin host would depend upon other variables.
edit: I should add that I've not used jellyfin and am unfamiliar with how plugins are implemented. I don't want to speak out of turn, only to suggest, in the abstract, that just because software isn't exposed to the net, doesn't mean it cannot harbor exploits that could become problematic. Plugins just seem to be a common vector for such types of software.
Well. If you're not streaming why have such a service in the first place? If I didn't stream remotely with Plex (and share with my friends and family) I'd just go back to running Kodi on my htpc like I did ten years ago.
steam locally to multiple devices plus for remote streaming I just VPN into my home network
Fair enough.