2nd breach? 2nd email after 6 days

[OttoKerner]

Important Notice of Security Incident

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 …

Basically this:

1. change the password of your plex.tv account. Tick the checkbox “Sign out connected devices after password change”. https://app.plex.tv/desktop/#!/settings/account
2. stop and restart your Plex Media server
3. re-claim your plex server (i.e. connect it to your plex user account again)
4. open every and each plex device and plex client app and re-connect them all to your plex user account

The precise method to achieve 3) can differ, depending on the platform where Plex server is running on.