Trello leak: Over 15 million email addresses exposed. How did this happen?

Trello is a popular project management tool that's well-known for its kanban-style list format. On Tuesday, the private data connected to 15,115,516 Trello user profiles was shared on a popular forum for hackers, as first noticed by the cybersecurity news website Bleeping Computer. It appears that a single hacker discovered a flaw in Trello's system and was able to extract sensitive private user data.While much of the data connected to a Trello account is public information, not all of it i