If you knew apps like Facebook and Dropbox had security issues would you still use them?
According to several news sources the security issue is purely down to poorly managed security procedures, for example login details held within a plain-text file. Putting this aside from a programming standpoint it is not uncommon for developers to store user details in a text file purely because it allows easy maintenance for them and also allows the app to work more fluid. Even with that in mind you can see the ultimate flaw, data encryption is key.
There are a couple of things you can do to prevent this, when logging into any application do not allow it to remember your login credentials because straight away that will do two things; give full application access and it will create a text file with your details stored in it. The other thing you can do is after you are finished with an app log out fully and close it off I know this may be a pain because you have to log back in every time, but if you are security conscious then this method won’t cause much distress.
In time App developers will fix this flaw, it isn’t anything major and also nothing to get really worried about.