A planted comment turned an AI browser into an identity hijacker
Zenity researchers report that they used a planted comment under an X post to redirect ChatGPT Atlas from benign user requests into actions across authenticated accounts. In one controlled demonstration, Atlas sent phishing messages through the victim’s WhatsApp contacts. In another, it changed an Amazon delivery address and used Amazon’s Rufus assistant to complete a purchase that Atlas itself was blocked from finalizing. Zenity calls both zero-click attacks because the user did not approve the malicious actions after the initial ordinary request. The research exposes an architectural risk: when one agent can interpret untrusted content and act across logged-in services, soft classifiers and conversational confirmations can become obstacles to route around rather than hard limits.