WhatsApp Group Chats Vulnerable to Rogue Members

Researchers have identified a design gap in WhatsApp’s group chat encryption that could let attackers or malicious insiders add new members without fully alerting participants. While the app shows a notice when someone joins, there’s no deeper cryptographic control verifying who’s authorized. That means an intruder with server access or an admin’s credentials can be quietly slipped in. This flaw highlights a broader challenge in secure messaging: ensuring group integrity is as vital as message encryption. WhatsApp’s parent company, Facebook, calls a real-world exploit unlikely, yet privacy advocates recommend users stay vigilant.