This post is also available in 简体中文, 繁體中文, 日本語, 한국어, Español, Português, Français, Deutsch and Polski. On Thanksgiving Day, November 23, 2023, Cloudflare detected a threat actor on our self-hosted Atlassian server. Our security team immediately began an investigation, cut off the threat actor’s access, and on Sunday, November 26, we brought in CrowdStrike’s Forensic team to perform their own indep