Healing Paper

South Korean Medical Beauty Platform Gangnam Unni Suffers API Breach Exposing 220,000 Users' Sensitive Photos and Medical Records

Healing Paper, operator of South Korea's largest medical beauty information platform Gangnam Unni, confirmed a data breach affecting nearly 220,000 customers after an API endpoint used to query consultation records was abnormally accessed. The incident exposed highly sensitive personal information including names, contact details, medical consultation reasons, treatment progress, uploaded pre-procedure photos, appointment times, actual procedures performed, and payment information. Approximately 160,000 South Korean users and 60,000 overseas users were impacted, including 481 from mainland China, 4,218 from Taiwan, and others from Japan and Thailand. Attackers exploited weak authentication and rate limiting on the API, first detected on September 4, with a second attempt on a different path the following day. The breach raises risks of targeted phishing and extortion using victims' private medical images and records. Healing Paper has reported the incident to authorities, implemented enhanced authentication and monitoring, and allowed users to check their exposure status within 30 days.