Sandboxing only applies to App Store apps. Things you install from Cydia have no limitations in regards to power so it's the user's responsibility to choose carefully.
Oh, well that's OK then. So much for the sandbox I guess.
I still don't get how code reviews matter here. A bug in our code can only cause stability issues, not security issues, our patches regarding giving processes privileges are deterministic by design, they either always work or never do.
Are you for real? How on earth do your think you got Jailbreak to begin with? A bug caused a security issue that you got to exploit with this.
Of course jailbreaking requires you to misuse things, it's literally a hack and "to hack" means "to use in an unintended manner".
So now you're making up terminology now? At best in computer parlance Hacking involved breaking into computer systens or the like. These days hacking also includes clever ways to solve problems.