A security release for all previous versions WordPress is now available, which the company strongly recommends all users upgrade to immediately. WordPress 4.7.1. is a security release for all previous versions and we strongly encourage you to update your website(s) immediately.
Specifically, the release addresses eight security issues affecting WordPress versions 4.7 and earlier:
Remote code execution (RCE) in PHPMailer
The REST API exposed user data for all users who had authored a post of a public post type. WordPress 4.7.1 limits this to only post types which have specified that they should be shown within the REST API.
Cross-site scripting (XSS) via the plugin name or version header on update-core.php.
Cross-site request forgery (CSRF) bypass via uploading a Flash file.
Cross-site scripting (XSS) via theme name fallback.
Post via email checks mail.example.com if default settings aren’t changed.
A cross-site request forgery (CSRF) was discovered in the accessibility mode of widget editing.
Weak cryptographic security for multisite activation key.
In addition to the issues listed above, WordPress 4.7.1 fixes 62 bugs from 4.7. Version 4.7.1 can be downloaded directly from your WordPress dashboard, or you may already have it if you’ve signed up for automatic updates.