This security and maintenance release features 46 fixes and enhancements. Plus, it adds a number of security fixes—see the list below.
WordPress 5.3.1 is a short-cycle maintenance release. The next major release will be version 5.4.
While WordPress.org already started automatic background updates that do not require you to do anything, it may take some time for them to get to your website. If it does not update automatically today, either do it yourself (and don’t forget to make a full backup first!) or contact Dusk Owl for help.