From social networking websites (Yahoo, LinkedIn etc) to cloud storage providers (Dropbox), everything is insecure. Nobody is secure in the world of hackers. Few days back, Yahoo & LinkedIn also got hacked, Millions of Yahoo and LinkedIn passwords also leaked and posted online. Our very little mistake such as insecure password, use confidential information on unauthorized websites etc can make us the next victim of such type of hacking.
“Our investigation found that usernames and passwords recently stolen from other websites were used to sign in to a small number of Dropbox accounts. We’ve contacted these users and have helped them protect their accounts.”
One can protect their Dropbox account using some security measures such as Two-factor authentication, identification of suspicious activities, examine the active logins to your account, Strong passwords etc.
Finally, I recommend you guys to keep different secure passwords for every website you use, though it is easy to remember the same password for all.