Facebook’s internal blogging feature handles HTML image tags embedded by users could be exploited to start a DDoS attack. Facebook refused to pay researcher Chaman Thapa for his discovery under its bug bounty program. While interesting research, would-be DDoS attackers would unlikely use Facebook Notes, experts said. Such an attack “would be defendable using existing technology,” Dan Holden, director of security research at Arbor, said. DDoS experts said such an attack would mean ignoring more effective techniques, such as reflection and amplification.”]
Source: https://www.csoonline.com/article/2150860/ddos-attack-from-facebook-possible-but-unlikely.html