National Cybersecurity Center
Advisory Alert

Fake “ChatGPT Ad Blocker” Is Stealing User Conversations

A fake Chrome extension called “ChatGPT Ad Blocker” is being used to trick people into installing software that steals private ChatGPT conversations. It pretends to be a helpful tool, but it secretly copies what users type and sends it elsewhere.


Who Is at Risk

Anyone using ChatGPT’s free-tier in Chrome.

What to Watch For

Be cautious of ChatGPT-related extensions with few reviews or unusual permissions. A pop-up that says “New Ad Report Received” can also be a warning sign the extension is malicious.

What to Do

Remove any suspicious browser extensions now, and only install add-ons from trusted publishers after checking reviews and permissions.

Stay Protected

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