Change your DropBox password immediately
Dropbox users should update their passwords and enable two-factor authentication. A hacker is claiming to have collected 7 million usernames and passwords.
To change your password, log in to your Dropbox account, click on your name and choose “settings.” Then, click on the security tab. If you have not already configured it, configure for two factor authentication.
At this time Dropbox states they have not been hacked and that any information collected is from third party apps.