WordPress 4.2.3 has been released.
It contains fixes for some pretty nasty stuff. Usually, the updates have to be manually triggered for a day or so before the auto-update feature picks them up. I was on the blog this morning and there were no “manually triggered auto-updates” available, so it looks like this one has been pushed straight out, which probably makes sense.
By the time you’ve read this you are probably up to date already, but if not, get on your blog and give it a nudge. 🙂
You can see the changelog here.