Hundreds of thousands of Australian blood donors had their personal information and sexual history leaked online after an "unauthorized person" accessed the Australian Red Cross blood service website.

Hackers managed to steal over 68 million user email address and password combinations from Dropbox during a hack that occurred in 2012.

65 million Tumblr users are now believed to be affected by a data breach that took place in 2013, leaving their email addresses and passwords vulnerable to hackers.