Get Permission Researchers with NetScout's Atlas Security Engineering and Response Team are warning that attackers are abusing certain versions of the Plex media server app to strengthen and amplify various DDoS attacks. The NetScout researchers believe that about 27,000 Plex media servers are vulnerable to the type of DDoS amplification attacks described in a new report. The Plex media server application works with Windows, Linux and macOS operating systems and normally lets users share video and other media with other devices. The application can also connect with other devices. such as network-attached storage devices and external RAID storage units. In the incidents that NetScout found, numerous DDoS-for-hire services were using the vulnerable Plex app to send junk traffic to targeted victims to overwhelm their networks and cause a crash.