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Bleeping Computer
Newsletter platform Substack is notifying users of a data breach after attackers stole their email addresses and phone numbers in October 2025. [...]
The Hacker News
Hey 👋 there, cyber friends! Welcome to this week's cybersecurity newsletter, where we aim to keep you informed and empowered in the ever-changing world of cyber threats. In today's edition, we will cover some interesting developments in the cybersecurity landscape and share some insightful analysis of each to help you protect yourself against potential attacks. 1. Apple 📱 Devices Hacked with
Have I Been Pwned
In March 2026, the personal development and achievement media brand . The incident exposed 250k unique email addresses along with names, IP addresses, phone numbers and, for a limited number of staff members, bcrypt password hashes. The data also included orders containing physical addresses and the payment method used. In , they advised their system had also been abused to send offensive newsletters with quotes falsely attributed to contributors. SUCCESS suffered a data breach SUCCESS' disclosure notice
The Hacker News
In today's fast-evolving digital landscape, cybersecurity has become a cornerstone of organizational resilience. As cyber threats grow increasingly sophisticated, the demand for skilled cybersecurity professionals has never been higher. Whether you're a seasoned cyber professional or just starting your journey, signing up for the GIAC Newsletter ensures you're always informed and equipped for
The Register
Blames 'third-party provider' as phishers drain Ethereum wallets Domain registrar Namecheap blamed a "third-party provider" that sends its newsletters after customers complained of receiving phishing emails from Namecheap's system.…
Graham Cluley
The important thing to realise about the most recently-reported data breach at email newsletter service Mailchimp is that it’s not just Mailchimp’s customer data that was put at risk. Even if you’re not personally a customer of Mailchimp, even if you’ve never even heard of Mailchimp, you may be affected.
Graham Cluley
For the second time in less than a year, email newsletter service Mailchimp has found itself in the embarrassing position of admitting it has suffered a data breach, putting its customers' subscribers at risk.
Bleeping Computer
A critical vulnerability in the Ghost CMS newsletter subscription system could allow external users to create newsletters or modify existing ones so that they contain malicious JavaScript. [...]
The Hacker News
Cybersecurity researchers have detailed two security flaws in the JavaScript-based blogging platform known as Ghost, one of which could be abused to elevate privileges via specially crafted HTTP requests. Tracked as CVE-2022-41654 (CVSS score: 8.5), the authentication bypass vulnerability that allows unprivileged users (i.e., members) to make unauthorized modifications to newsletter settings.
Graham Cluley
Two men, who previously worked at eBay, have been sentenced to prison after admitting their role in a cyberstalking campaign that targeted the editor and publisher of a newsletter that criticised the company. Read more in my article on the Hot for Security blog.