Not sure if already discussed, but it would be tremendously helpful if such information could be pushed out to us admins proactively. It took me some googling to even find this thread.
HubSpot is aware of CVE-2021-44228 and we have performed a thorough check of our systems and have seen no indications of any impact from this vulnerability at this time. Out of an abundance of caution, our team is continuing to monitor this event. Customers don't need to take any action at this time.