Facebook — Data Breach

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Oct 25, 2018→Mar 21, 2019

Facebook disclosed that between 200 million and 600 million user passwords for Facebook, Facebook Lite, and Instagram had been stored in plaintext on internal systems since as early as 2012, searchable by over 20,000 employees. The Irish DPC later fined Meta €91 million in September 2024 for this incident.

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Sources

Krebs on Security: Facebook Stored Hundreds of Millions of Passwords in Plain Text
TechCrunch: Facebook Admits It Stored Hundreds of Millions of Passwords in Plaintext

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