WordPress 5.2.4 was released on October 14, 2019. This is a security release, so it is essential to install it as soon as you can. It should install automatically unless you have updates disabled.
WordPress versions 5.2.3 and earlier are affected by these bugs, which are fixed in version 5.2.4. Updated versions of WordPress 5.1 and earlier are also available for any users who have not yet updated to 5.2.
From the WordPress.org Blog
You can read more at https://wordpress.org/news/2019/10/wordpress-5-2-4-security-release/