In WordPress through 4.9.2, unauthenticated attackers can cause a denial of service (resource consumption) by using the large list of registered .js files (from wp-includes/script-loader.php) to construct a series of requests to load every file many times.
https://www.exploit-db.com/exploits/43968/
https://wpvulndb.com/vulnerabilities/9021
https://thehackernews.com/2018/02/wordpress-dos-exploit.html
https://github.com/WazeHell/CVE-2018-6389
https://github.com/UltimateHackers/Shiva
https://baraktawily.blogspot.fr/2018/02/how-to-dos-29-of-world-wide-websites.html