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Blue Shield of California shared 4.7 million members' data with Google
A Google Analytics misconfiguration sent member health data to Google Ads between April 2021 and January 2024, affecting 4.7 million people.
- Organisation
- Blue Shield of California
- Disclosed
- 23 April 2025
- Affected
- 4,700,000
- Data
- Health plan and search data
- Attacker
- None (misconfiguration)
- Severity
- major
- Region
- Global
- Source
- Malwarebytes ↗
Cite this
Nuffield Consulting, “Blue Shield of California shared 4.7 million members' data with Google”, The Daily Tech Wire outage & breach log, 23 Apr 2025. https://techwire.nuffieldconsulting.com/incidents/2025-04-23-blue-shield-of-california-breach/ (retrieved 15 Nov 2026).
This entry summarises public reporting. Please also cite the original source: Malwarebytes, https://www.malwarebytes.com/blog/news/2025/04/4-7-million-customers-data-accidentally-leaked-to-google-by-blue-shield-of-california.
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