WordPress 5.5.2 is a short-cycle security and maintenance release. It features 14 bug fixes in addition to 10 security fixes. All versions since WordPress 3.7 have also been updated to fix the following security issues. The next major release will be version 5.6.2. You can download the latest release from WordPress.org, or visit your Dashboard Updates and click Update Now. Because this is a security release, it is recommended that you update your sites immediately.”]
Source: https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/