We have been notified of additional security vulnerabilities in cPanel relating to the CalDAV service. (SEC-73728 & SEC-73755)
We are in the process of orchestrating out of band cPanel updates across the estate, but as this is likely to take several hours to complete, we have temporarily applied network level restrictions on the following ports inbound:
Once updates have been applied across the estate we will remove these temporary network restrictions.
Thank you for your patience.