Hackers spill user data from global smartphone directory

TrueCaller was allegedly broken into by hacktivist group Syrian Electronic Army, according to the organization’s Twitter account.

The hackers said “they have hacked into the TrueCaller's server and downloaded more than 7 databases.  The[y] said the main database is 450GB.”

The app's databases contain user access codes to Facebook, Twitter, LinkedIn and Gmail accounts.  
Apparently, the app is based on an outdated, flawed version of WordPress that enabled the group to overtake system controls.

“TrueCaller confirmed the security breach in their [official] blog. However, they denied the hacker's claim that they had access to the social network's access codes."