This week Gareth Wright
Wright describes several different ways in which your login credentials could be obtained by a malicious user, including hidden applications installed on shared PCs, customized apps, or modified speaker dock that could copy your plist.
The Next Web has confirmed that Dropbox for iOS is also vulnerable to this issue. Given that two such high-profile apps as Facebook and Dropbox are vulnerable to credential theft, it is likely that other apps are also affected by the issue.
As many reports note, this method of gathering login credentials is not actively utilized in a malicious manner, and users can protect their data for the time being by not plugging their devices into shared computers and charging stations.