Earlier today, WordPress.com had a low-level (root) access break-in on several of their servers which hosted WordPress.com websites. According, to a note posted on the WordPress blog, some user data on those servers might have been revealed.
In the post, the founder of WordPress; Matt Mullenweg said that the extent of data breach is not known yet, but they are actively investigating the logs to determine the extent of the breach.
We have been diligently reviewing logs and records about the break-in to determine the extent of the information exposed, and re-securing avenues used to gain access. We presume our source code was exposed and copied. While much of our code is Open Source, there are sensitive bits of our and our partners’ code. Beyond that, however, it appears information disclosed was limited.
Matt did not clearly mention whether user data was compromised, however, he did post suggestions on creating secure passwords (Read our guide on creating secure passwords, creating strong passwords to avoid getting hacked or unique tools to create secure passwords). As an advice, just make sure to changed your WordPress.com password though.
The WordPress developers have already patched the problem, however, the damage might already have been done. We’ll keep you updated with further information on this.