Zweerink explains that he released the tool on 7 February to visualize the following properties of any phone number that uses WhatsApp: Would-be snoopers don’t actually have to be WhatsApp users to exploit the bug.Īll you have to do to retrieve the online status of any telephone number is to add it to contacts and open a chat window, without alerting the phone number owner or asking for his or her permission.
I could just say this in like a blog article (like I tried but got marked as spam) that the privacy options are broken, but you wouldn't realize the impact it actually has. It just started out as experimenting with WhatsApp to build a bot, but I was stunned when I realized someone could abuse this "online" feature of WhatsApp to track anyone's online status. He says it’s a proof of how “broken” WhatsApp privacy options are: Zweerink’s web-based tool, WhatsSpy Public, tracks any WhatsApp user you choose to follow. Now, Dutch student Maikel Zweerink has cooked up an app to illustrate WhatsApp’s weaknesses. It was reported to WhatsApp as early as September 2014. Just a few weeks after WhatsApp was found to be flashing photos that users weren’t supposed to see, we’ve got another privacy glitch: this time, it looks like changing your privacy settings doesn’t stop people from tracking your status and any changes you’ve made to profile photos, status messages and settings.
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