An unpatched application-level denial of service (DoS) vulnerability in WordPress websites could help hackers take down nearly any WordPress website
A simple yet serious application-level denial of service (DoS) vulnerability has been discovered in WordPress CMS platform that could allow anyone to take down most WordPress websites even with a single machine—without hitting with a massive amount of bandwidth, as required in network-level DDoS attacks to achieve the same.
Source: Unpatched DoS Flaw Could Help Anyone Take Down WordPress Websites