In WordPress before 4.7.3, there is cross-site request forgery (CSRF) in Press This (wp-admin/includes/class-wp-press-this.php), leading to excessive use of server resources. The CSRF can trigger an outbound HTTP request for a large file that is then parsed by Press This.
openwall.com/lists/oss-security/2017/03/06/7
www.securityfocus.com/bid/96602
www.securitytracker.com/id/1037959
codex.wordpress.org/Version_4.7.3
github.com/WordPress/WordPress/commit/263831a72d08556bc2f3a328673d95301a152829
sumofpwn.nl/advisory/2016/cross_site_request_forgery_in_wordpress_press_this_function_allows_dos.html
wordpress.org/news/2017/03/wordpress-4-7-3-security-and-maintenance-release/
wpvulndb.com/vulnerabilities/8770