Claude Chrome extension flaw lets malicious extensions act
🛡️ A vulnerability in Anthropic's Claude for Chrome extension can let a malicious extension simulate clicks to trigger nine predefined AI workflows. The issue, found by Ax Sharma of Manifold Security, stems from the extension failing to verify the browser's Event.isTrusted flag before executing tasks tied to page click handlers. A malicious extension with permissions on claude.ai could inject elements and fire synthetic clicks to abuse Claude's authenticated access to services like Gmail, Docs, Calendar, and Salesforce. Anthropic acknowledged the report and classified a related skipPermissions parameter as informational.
