The data isn't really safe, but not really unsafe 🙂
To access your data, there are multiple ways:
1) login to your VM and copy the data via network
2) create a new VM and attache your existing harddrive to this new VM. Then you don't need login credentials to your old VM and can access your data ...
But: just with having login to your hypervisor, you cannot access data. You need to have some criminal energy
--
Alex
(VMware VCAP-DCV, NetApp NCIE, LPIC 2)