Substack data breach exposed user email addresses and phone numbers for months before CEO Chris Best confirmed the October ...
Substack says hackers accessed user emails, phone numbers, and internal metadata in October 2025, with a database of 697,313 ...
The company has emailed affected users after a dark web source claims the data of almost 700,000 users was compromised. Substack, a high-profile publishing platform widely used by academics, ...
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