WordPress 4.2.3 was released on July 23, 2015.
This is a Security and Maintenance release aimed at patching a couple of security holes as well as fixing 20 bugs from previous releases. For information on what new features will await you in this new release, visit:
Since this is a security update, plugins should update rather quickly. Once all of your website’s plugins are updated or confirmed compatible with the new software, I will contact you personally to set up an upgrade date.