Just like Digital SLR's have enabled anyone willing to put down a couple of hundred on a camera the ability to tout themselves as a wedding or fashion photographer; the commoditisation of software development tools has brought development capabilities to the keyboards of anyone.
This isn't quite a new problem, Sarbanes Oxley (SOX) called out the issues with end user computing and mandated controls. Although these were primarily focussed around in-house excel spreadsheets that traders were fond of building into frankenstein-esque applications with no controls.
So, it's not the challenge that is necessarily new, it's the sheer scale of it.
It’s important that IT leadership and security teams realize that, just like earlier shifts in computing such as BYOD and the consumerization of cloud brought on by cloud computing, that they’re not going to put the brakes on the rise of the citizen developer. They’re going to need to seek out their internal citizen developers and work with the various business units to support and guide this new wave of developers in ways that are secure but also enable businesses to develop the apps everyone needs.