Welltok, Inc. notified The Group Health Plans of Stanford Health Care of a data breach involving the MOVEit Transfer server. An unknown actor exploited software vulnerabilities on May 30, 2023, to access and exfiltrate data. The incident was discovered on August 11, 2023. Affected data includes identity information. Welltok engaged third-party cybersecurity specialists and is offering credit monitoring services.
Affected (this filing): 6