[iMore.com]

Snapchat has a had a rough few weeks in terms of security. People's photos were allegedly stolen and posted online recently through the use of a third-party apps. Those apps used reversed-engineered APIs to access the service, which creates a significant vulnerability in account security.
Now, the company appears to be taking a hardline against the practice by sending out emails to those who have been utilizing third-party apps.

Full story from the iMore Blog...