After over 13 million downloads of WordPress 4.8, WordPress are pleased to announce the immediate availability of WordPress 4.8.1, a maintenance release.
This release contains 29 maintenance fixes and enhancements, chief among them are fixes to the rich Text widget and the introduction of the Custom HTML widget. For a full list of changes, consult the release notes, the tickets closed, and the list of changes.
Download WordPress 4.8.1 or visit Dashboard → Updates and simply click “Update Now.” Sites that support automatic background updates are already beginning to update to WordPress 4.8.1.
Source from WordPress blog