Squarespace change history: 3D Secure purchase attempts for subscriptions are failing

Squarespace reported a major Accounts & Billing outage in which 3D Secure subscription purchase attempts failed, preventing affected customers from completing purchases. It started at 2025-12-08 17:02 UTC and was resolved at 2025-12-08 18:23 UTC, lasting 1 h 20 min. Squarespace said the issue related to third-party services and 3D Secure payments; no specific fix was stated.