WordPress security release 4.4.2 is now available. This is a WordPress security release for all previous versions. WordPress strongly encourages you to update your sites immediately.

WordPress Security Release 4.4.2 Fixes Two Known Issues

WordPress versions 4.4.1 and earlier are affected by two security issues:

In addition to the security issues above, WordPress 4.4.2 fixes 17 bugs from 4.4 and 4.4.1. For more information, see the release notes or consult the list of changes.

Source: https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/