WordPress 4.8.2 is a security and maintenance release that should be applied immediately.
Things to note
WordPress versions 4.8.1 and earlier are affected by nine security vulnerabilities that are addressed in the 4.8.2 version update. Along with the security updates – there are multiple maintenance fixes to this new version as well. You can read more by looking at the release notes: https://codex.wordpress.org/Version_4.8.2
If you have not done so already – download the update or simply use your existing installation of WordPress to update your site. Either way – this is an excellent time to make a backup copy of your site(s) before upgrading.