Our smartphones are a treasure trove of information that companies often try to get their hands on. Some, we let do that in exchange for the services they provide, but others try to do it on the sly by concealing exactly what they’re doing. And then there are hackers that just want to get your data without you even realizing it.

There’s a constant game of cat and mouse between software developers and hackers but even the largest corporations can miss a creative way in which the ill-intended are able to siphon data away from their customers. Such was the case with a vulnerability in Apple’s ...