Zendesk discovered the breach earlier this week, then patched the vulnerability and closed off the hacker’s access in short order. The company believes the hacker downloaded the email addresses of Tumblr, Twitter, and Pinterest customers who attempted to get support from the companies. Pinterest and Tumblr advised affected users to be cautious of any unexpected emails they receive. The hacks come just days after Apple Twitter and Facebook revealed that their employees computers fell victim to unauthorized access to their computers. The companies are working with authorities to bring anyone involved to justice.
Source: https://thehackernews.com/2013/02/zendesk-security-breach-weve-been-hacked.html