So, recently a woman spoke about a bug that she brought a new phone and she logged into whatAapp account but when she logged in she saw the messages of the past user of the device. The alleged flaw was spotted by Amazon employee Abby Fuller, who tweeted: ‘Logged into WhatsApp with a new phone number today and the message history from the previous number’s owner was right there?!
logged into whatsapp with a new phone number today and the message history from the previous number's owner was right there?! this doesn't seem right.
— Abby Fuller (@abbyfuller) January 11, 2019
Fuller claimed she bought a new phone which has a number registered to a previous user – which is quite common. But this number was still registered with WhatsApp. Fuller claimed this let her see someone else’s messages. Now, this alleged bug won’t be an issue for you if you never swap numbers.
Yes it was a new device. No it wasn't second hand. It was not a second hand SIM. Yes I'm sure they weren't my messages, or groups that I was added to. Yes they were in plaintext. I am sure it's my phone number. It was not restored from a backup.
— Abby Fuller (@abbyfuller) January 11, 2019
There are ways to log into your WhatsApp, like direct login or change number option. In change number option the messages and groups you’re in do not go away but the contact number for you changes.
I guess this issue is like misunderstanding of her. She did something that went wrong and she decided to speak about it on social media.
Others, just be careful and keep a check on your devices and its apps.
Source: https://www.oyeyeah.com/blogs/whatsapp-has-a-huge-bug-lets-anyone-see-your-messages/