using a voice assistant (siri or google assistant), an attacker can start a whatsapp call, or send a whatsapp message to any contact even when the whatsapp screen lock feature is enabled. Without verifying their fingerprint.
-Start a whatsapp call/video_call with any contact without going through touch ID -Send a whatsapp message to any contact without going through touch ID -Display the last message in a conversation with any contact without going through touch ID
Start Siri/google assistant on a phone with whatsapp installed and screenlock enabled from within the whatsapp privacy settings .
Say: "Send X a WhatsApp message saying Y"
Say:"Call X on WhatsApp"
Say:"Read my recent message with X"
Where X is the person you want to send the message to, and Y is the message .