NetScout researchers believe about 27,000 Plex media servers are vulnerable to the type of DDoS amplification attacks described in a new report. The Plex media server app normally lets users share video and other media with other devices. In some instances, the application will use the Simple Service Discovery Protocol – SSDP – to locate universal plug-and-play gateways on broadband internet access routers. When this happens, the Plex service registration responder is exposed to the internet, and attackers can then take advantage of the app to help amplify DDoS attacks.”]
Source: https://www.databreachtoday.com/plex-media-servers-used-to-amplify-ddos-threats-a-15941