“Have you ever felt like the Internet Archive runs on sticks and is constantly on the verge of suffering a catastrophic security breach? It just happened. See 31 million of you on HIBP!”
Troy Hunt had the file nine days before the defacement and contacted the Archive on October 6th. It held email addresses, screen names and Bcrypt-hashed passwords for 31 million unique addresses. The attackers defaced the site through a JavaScript library and knocked it offline with a DDoS at the same time. The library of the internet kept its own front door unlocked.