Stay informed on the latest Facebook security updates and protect your personal data with expert analysis and tips on our Information Security tag.
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Background for this topic.
Facebook is a social networking platform for user profiles, messaging, groups, pages, and content sharing, delivered through web and mobile clients and interfaces for third-party applications. Its security relevance comes from concentrating identity, relationships, communications, and personal data in a connected account ecosystem; compromise can expose private content or enable impersonation and targeted social engineering.
Security coverage includes vulnerabilities in Facebook’s clients, APIs, authentication, and account-recovery workflows, along with abuse of messages, groups, applications, and advertising features to distribute phishing or malicious links. Practitioners should distinguish platform flaws from credential theft or fraudulent content, assessing advisories by affected component, exploitability, and required updates. Privacy controls and third-party permissions reduce exposure but do not replace unique credentials, multi-factor authentication, session review, and prompt reporting; investigations may also require platform logs and preserved account or message evidence.
Researchers compiled a list of 3.5 billion WhatsApp mobile phone numbers and associated personal information by abusing a contact-discovery API that lacked rate limiting. [...]
Researchers Were Able to Query 3.5 Billion AccountsSecurity researchers were able to scoop up the telephone numbers of billions of WhatsApp users through an enumeration tool provided by app owner Meta. The sheer quantity of leaked numbers - 3.5 billion in total - would amount to "the largest data leak in history."
The infostealer specifically targets Brazilian Portuguese speakers and combines malware designed to phish banking credentials and steal data, a worm, and some uniquely Brazilian quirks.
CTM360 has identified a rapidly expanding WhatsApp account-hacking campaign targeting users worldwide via a network of deceptive authentication portals and impersonation pages. The campaign, internally dubbed HackOnChat, abuses WhatsApp’s familiar web interface, using social engineering tactics to trick users into compromising their accounts
A new Android banking trojan named Sturnus can capture communication from end-to-end encrypted messaging platforms like Signal, WhatsApp, and Telegram, as well as take complete control of the device. [...]
Cybersecurity researchers have disclosed details of a new campaign that leverages a combination of social engineering and WhatsApp hijacking to distribute a Delphi-based banking trojan named Eternidade Stealer as part of attacks targeting users in Brazil
Trustwave SpiderLabs has observed new banking Trojan Eternidade Stealer targeting Brazil using WhatsApp for propagation and data theft
Two-day exploit opened up 3.5 billion users to myriad potential harms Researchers in Austria used a flaw in WhatsApp to gather the personal data of more than 3.5 billion users in what they believe amounts to the "largest data leak in history."…
Meta on Tuesday said it has made available a tool called WhatsApp Research Proxy to some of its long-time bug bounty researchers to help improve the program and more effectively research the messaging platform's network protocol