WordPress versions 4.9.6 and earlier are affected by a media issue that could potentially allow a user with certain capabilities to attempt to delete files outside the uploads directory.
Thank you to Slavco for reporting the original issue and Matt Barry for reporting related issues.
Seventeen other bugs were fixed in WordPress 4.9.7. Particularly of note 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.
Download WordPress 4.9.7 or venture over to Dashboard → Updates and click “Update Now.” Sites that support automatic background updates are already beginning to update automatically.