Diese E-Mail habe ich gerade erhalten:
System Security Notice for Matrix.org
On Thursday 11th of April, 2019 we identified and addressed a security issue affecting the matrix.org homeserver. You're receiving this email because you have an account on this homeserver.
An attacker gained access to the servers hosting Matrix.org. The intruder had access to the production databases, giving them access to any unencrypted message data, password hashes and access tokens (these access tokens have now been invalidated).
No plaintext passwords were leaked, but weak passwords could still be cracked from the hashed passwords. If you have not already done so you should change your password now.
If you have given an IRC bridge your NickServ password then you should change this password, too. There's no evidence bridge credentials were compromised, but we recommend changing this password as a precaution. We're still working to restore the IRC bridges, so for now please change your password on the IRC network directly.
You might have lost access to your encrypted messages. As we had to log out all users from matrix.org, if you do not have backups of your encryption keys you will not be able to read your encrypted conversation history. However, if you use server-side encryption key backup (the default in Riot these days) or take manual key backups, you will be able to read these messages.
N.B. if after changing your password and re-enabling server-side encryption key backup you can't read your encrypted messages, you may need to log out and log in again to restore access.
We're sorry for the inconvenience caused and thank you for your patience and understanding. For more details about the incident, please see the blog post: https://matrix.org/blog/2019/04/11/security-incident/
and follow live updates on twitter https://twitter.com/matrixdotorg.
We are conducting a retrospective on this incident and will publish our conclusions on the Matrix blog.
The Matrix.org team