It is quite annoying that usb does no longer work out of the box for Virtualbox with ubuntu host. The issue seems to affect multiple Linux distros. As of version 5.1.18, it seems that the bug is still not fixed.
The workaround is not very complicated. But it is a nuisance nonetheless.
Update:
If still doesn’t work, check if your user name belongs to the group ‘vboxusers’. You can check that with “groups $USER”. If not, please add your user name to the ‘vboxusers’ group with this command:
sudo adduser $USER vboxusers
After that you must logout and login.
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Update:
For some reason, I just can’t make it working for a fresh installation of virtualbox 6.1.32 on 20.04. It probably has nothing to do with “group”. I got no result even with
sudo VBoxManage list usbhost
Update:
Finally, it seems to work by adding the GID to the udev rules file installed by vbox. See github.com/dnschneid/crouton/wiki/VirtualBox-udev-integration.