March 23, 2019

WordPress 3.9.2 Security Release: UPGRADE NOW

WordPress 3.9.2 is now available as a security release for all previous versions. We strongly encourage you to update your sites immediately.

This release fixes a possible denial of service issue in PHP’s XML processing, reported by Nir Goldshlager of the Salesforce.com Product Security Team. It was fixed by Michael Adams and Andrew Nacin of the WordPress security team and David Rothstein of the Drupal security team. This is the first time the two projects have coordinated joint security releases.

WordPress 3.9.2 also contains other security changes:

  • Fixes a possible but unlikely code execution when processing widgets (WordPress is not affected by default), discovered by Alex Concha of the WordPress security team.
  • Prevents information disclosure via XML entity attacks in the external GetID3 library, reported by Ivan Novikov of ONSec.
  • Adds protections against brute attacks against CSRF tokens, reported by David Tomaschik of the Google Security Team.
  • Contains some additional security hardening, like preventing cross-site scripting that could be triggered only by administrators.
  • For more information, see the release notes or consult the list of changes.

Download WordPress 3.9.2 or venture over to Dashboard → Updates and simply click “Update Now”.

Sites that support automatic background updates will be updated to WordPress 3.9.2 within 12 hours. (If you are still on WordPress 3.8.3 or 3.7.3, you will also be updated to 3.8.4 or 3.7.4. Older WordPress versions are not supported, so please update to 3.9.2.)

As always, we highly recommend that you keep your WordPress installation, WordPress themes and WordPress plugins up to date to ensure that you’re running the most secure and feature rich version of WordPress.

If you need assistance with upgrading, please schedule your WordPress upgrade today via our WordPress Upgrade Service.

Anyone who is already subscribed to one of our upgrade packages has already been upgraded to WordPress 3.9.2.  If you’d like to make sure your site is always up to date, please check out out WordPress Maintenance Packages.