Mass General Brigham

The Mass General Brigham Health Plan data breach, linked to the exploitation of a vulnerability in Progress Software’s MOVEit Transfer platform by the Cl0p ransomware group, exposed extensive patient information managed through Welltok’s systems. The breach compromised over 4 million records, including sensitive personal and medical data such as full names, home addresses, phone numbers, email addresses, dates of birth, and insurance provider details.

Data Included in the Breach