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, ...
Newsletter platform Substack is notifying users of a data breach after attackers stole their email addresses and phone numbers in October 2025. Although the incident occurred four months ago, CEO ...
Newsletter platform Substack has confirmed a data breach in an email to users. The company said that in October, an “unauthorized third party” accessed user data, including email addresses, phone ...
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