Oh! No!

Buffer Users' Facebook and Twitter Feeds Spammed After Hacking

Buffer, the social-media management service that lets users schedule posts to Twitter, Facebook and Google+, has been hacked.

As a result, Buffer users who have authorized social sign-in through Buffer or linked their accounts to their social profiles, may have inadvertently sent out unauthorized spam messages.

Buffer, which helps users easily save links to share at a later date, has 1 million registered users. It integrates with a host of social networks, and users can login with their Facebook or Twitter credentials.

It appears that Buffer's Facebook and Twitter spam messages were first sent at around 2:20 p.m. ET.

Update: The Buffer team just sent this email out to all users:

Hi there,

I wanted to get in touch to apologize for the awful experience we've caused many of you on your weekend. Buffer was hacked around 1 hour ago, and many of you may have experienced spam posts sent from you via Buffer. I can only understand how angry and disappointed you must be right now.

Not everyone who has signed up for Buffer has been affected, but you may want to check on your accounts. We're working hard to fix this problem right now and we're expecting to have everything back to normal shortly.

We're posting continual updates on the Buffer Facebook page and the Buffer Twitter page to keep you in the loop on everything.

The best steps for you to take right now and important information for you:

Remove any postings from your Facebook page or Twitter page that look like spam
Keep an eye on Buffer's Twitter page and Facebook page
Your Buffer passwords are not affected
No billing or payment information was affected or exposed
All Facebook posts sent via Buffer have been temporarily hidden and will reappear once we've resolved this situation
I am incredibly sorry this has happened and affected you and your company. We're working around the clock right now to get this resolved and we'll continue to post updates on Facebook and Twitter.

If you have any questions at all, please respond to this email. Understandably, a lot of people have emailed us, so we might take a short while to get back to everyone, but we will respond to every single email.

- Joel and the Buffer team