The issue originated from one of Twitter’s support contact forms. Twitter found that a number of inquiries using the form came from IP addresses based in China and Saudi Arabia. Twitter began working on the issue on November 15, and resolved it on November 16. (TechCrunch)
Talking point: The security flaw could have been used to figure out the home countries of certain accounts, leading to repercussions for whistleblowers or other political objectors. Twitter apologized, saying, “We recognize and appreciate the trust you place in us, and are committed to earning that trust every day. We are sorry this happened.”