Do you use Dropbox? If so, we recommend you change your password now. Also, if you’ve used the same passwords anywhere else, change that too.
Strange that there’s no mention of it on the Dropbox home page but maybe they’re embarrassed.
Here’s the Guardian article.
If you want to know more try this site : https://www.troyhunt.com/the-dropbox-hack-is-real/
And……..why not turn on two factor authentication as well?