There were some security announcements about this last year:
https://matrix.org/blog/2025/08/security-release/
https://matrix.org/blog/2025/07/security-predisclosure/
It seems that there is some risk for public federated rooms, and an upgrade to version 12 is recommended.
This probably needs to be performed by whoever has access to the admin account (I believe this is only @syl20bnr at this time).
There were some security announcements about this last year:
https://matrix.org/blog/2025/08/security-release/
https://matrix.org/blog/2025/07/security-predisclosure/
It seems that there is some risk for public federated rooms, and an upgrade to version 12 is recommended.
This probably needs to be performed by whoever has access to the admin account (I believe this is only @syl20bnr at this time).