How I found critical vulnerabilities in Petlibro smart pet feeders allowing complete account takeover via broken OAuth, access to anyone's pet data, device hijacking, and private audio recordings - and how they're still leaving the auth bypass active for 'legacy compatibility' two months later.

I was looking at the Petlibro app - they make smart pet feeders, water fountains, and other IoT pet products. Millions of pet owners use these things to feed their cats and dogs remotely.

What I found was… a lot.