I recently had one of the above, so there must be hundreds of others. Messages were sent as if from me asking guests to provide new card numbers or their reservation would be cancelled.
I contacted Airbnb immediately and reported it, but they were unwilling to send all my future guests a system email. I spent a whole day contacting people, who in many instances had had money stolen from their accounts. Eventually I got an email from Airbnb saying they invested lots of time and money preventing such attacks and that I should change my password more often. I had already done so.
4 days later and there was another phishing attack on my account. I immediately changed by password. Future guests wrote to me saying the scammer was at it again. I called Airbnb as they failed to respond to a message after many hours. All they were interested in were the guest booking numbers who HAD MADE UNAUTHORISED PAYMENTS TO ME!!!!
It seems Airbnb support is populated by untrained individuals who would rather persecute hosts that listen.
I won't be booking via Airbnb as a guest ever again. How about you?