The XDA developers forum has already reported the security issue to the Microsoft, as explained by the operators of the forum the vulnerability could give higher privileges to the attackers if tried using a First Party Application, rather a third party app.
“There is a possibility to run any app package in any Program directory. Can be possible run homebrew app in second party and first party directory. Important thing is that app run’s with the reserved capabilies of the targeted directory. Such as “SECOND PARTY APPLICATION” capabilities and “FIRST PARTY APPLICATION” capabilities.” XDA-developers state in a blog post.
“Doees this mean that lumia phones can be-are interop unlocked?” asked the user matgras“May be or may not be. I’ve not research yet on it. Does this mean that lumia phones can be-are interop unlocked?Those methods also work on any OEM Device, not specific for the Lumia.”