@David84 Since last November, I have taken an interest in scams and scammers on Airbnb and have become somewhat familiar with thier tactics. I've found over 150 scam listings which I've had Airbnb remove from their platform.
If you define hacking as someone using malicious software to invade Airbnb's website, no, I have never heard of that. Airbnb's website itself is quite secure and, if used properly, can be trusted and relied upon to keep personal information safe.
What typically happens is a host or guest inadvertantly gives access to thier account by responding to phishing messages that come to them either by text or email messages. Scammers are extraordinarily sophisticated in mimicking Airbnb with logos, message style and what I call "hooks" that cause users to reply. What do I mean by "hooks"? Well, here are a couple of examples:
This was sent to a host promising a subscription to improve search placement. Who wouldn't want that, right? Problem is that airbnbpremium. host is not a legitimate Airbnb website. It is one of 100's of domains set up by scammers.
This would certainly get one's attention, but it is just another phishing attempt to get users to enter their email and password.
I could provide more examples as they are all variations on a theme to gain access to accounts. Another typical scam is for a "guest" telling a host in an inquiry that they found their listing on another website for a reduced nightly fee. The host is then directed to a scam website, where, you guessed it, the host is asked to log in.
Once a scammer has access to a user's account, they then tinker around and make changes as they did in your case. Your account becomes a tool for the scammers to set up phony listings to get unwary guests to pay by bank wire transfer outside the Airbnb payment system. Here's an example of payment instructions sent by a scammer to a guest:
Again, note the email address. While it has airbnb in it, it is not an email address that is used by Airbnb.
So, what to do? First of all, be very cautious about messages that request you enter your email address and password. Those two are the keys to your account and every user should protect them as they would the keys to their home. Second, look for the tell tale clues in the website URL or email address. If they don't end in airbnb.com or if they don't start with "https", they are phony sites. Here's an article that describes what is legitimate and what is not:
https://www.airbnb.com/help/article/971/how-do-i-know-if-an-email-is-really-from-airbnb
Also, be sure you have checked the box in the Security section of your Account Settings that turns on login notifications. This will give you a head's up that someone is logging into your account from a device that you don't use.
As for Airbnb not giving you information about what happened to your account, that's not unusual. They fix the problem but won't say exactly what happened for privacy and security reasons. Since they alerted you first, I suspect that someone was scammed and they traced it back to your compromised account.
So sorry to be so long winded, but I hope this will give you some background as to what may have happened in your case. If you are ever in doubt about a message purportedly from Airbnb, follow your gut feeling. It never hurts to ask Airbnb if it is legitimate.
I hope you have a very successful and profitable career as an Airbnb host!