Data Breach
Cash App Data Breach
8.2M records exposed • December 2021
Someone who used to work at Cash App kept their access after being fired. They used it to download stock trading information on 8.2 million customers.
What Happened
A former Cash App employee downloaded reports containing customer financial data after their employment ended. Block (formerly Square) took months to disclose.
Attack method: Former employee access
What Data Was Exposed
Full names, Brokerage account numbers, Stock trading activity, Portfolio values
Is your business exposed?
What to Do If You're Affected
- 1.
Review Cash App account activity
- 2.
Enable all security features in Cash App
- 3.
Monitor brokerage accounts for unauthorized activity
Lessons for Businesses
- • Employee offboarding must include immediate access revocation
- • Financial data downloads should be monitored
- • Insider threats require specific controls
Sources
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