Substack says hackers accessed user emails, phone numbers, and internal metadata in October 2025, with a database of 697,313 records later posted online.
Substack data breach exposed user email addresses and phone numbers for months before CEO Chris Best confirmed the October ...
Substack said that customer data was accessed in October 2025, but wasn't discovered until early February.
Substack, the hugely popular online content platform with 50 million active subscribers, has confirmed it has been hacked. Here’s what you need to know.
The hacker claims to have stolen nearly 700,000 Substack user records, including email addresses and phone numbers.
Newsletter platform Substack has confirmed it suffered a security incident, leading to the compromise of users’ email addresses and phone numbers. Chris Best, the CEO of Substack, notified users of ...
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