WordPress issued an out of band security and maintenance release yesterday with version 4.9.7 being pushed live patching 18 bugs in the content management system.
WordPress strongly recommends all users update their sites immediately.
Other issues fixed with the release were:
- Taxonomy: Improve cache handling for term queries.
- Posts, Post Types: Clear post password cookie when logging out.
- Widgets: Allow basic HTML tags in sidebar descriptions on Widgets admin screen.
- Community Events Dashboard: Always show the nearest WordCamp if one is coming up, even if there are multiple Meetups happening first.