WordPress 4.5.3 is now available. This is a security release for all previous version and it is strongly recommended to upgrade your WordPress installation to latest version.
WordPress versions 4.5.2 and earlier are affected by several security issues: redirect bypass in the customizer, two different XSS problems via attachment names, revision history information disclosure, oEmbed denial of service, unauthorized category removal from a post, password change via stolen cookie and some less secure sanitize_file_name edge cases.
To get more information about WordPress 4.5.3, you can refer their release notes.