On September 18, 2023 at 18:38 UTC, Pantheon detected an unusually high level of activity on our system that led to temporary issues with Dashboard and Terminus performance. We identified this to be a DoS attack and swiftly blocked it by the Web Application Firewall (WAF) but resulted in performance problems. Users faced difficulties logging in, encountered errors, and noticed sluggish Dashboard performance during this time. These issues were resolved by 16:24 PDT.
To enhance security, Pantheon is improving its WAF configuration, optimizing platform performance, and strengthening monitoring capabilities. We apologize for the interruption and are committed to preventing future incidents.