However, the popular texting alternative WhatsApp still has a major security problem. Attackers can compromise other users’ accounts with relative ease, and send and receive messages from another user’s account. In this respect nothing has changed – heise Security was able to successfully repeat its test this morning (Tuesday).

via WhatsApp threatens legal action against API developers – The H Security: News and Features.

WhatsApp Inc. has, however, been in touch with the developers behind the GitHub project WhatsAPI, an open source implementation of the WhatsApp protocol written in PHP and Python. The company has threatened to take legal action against the developers if they do not take the project offline. heise Security has been told by one of the developers that they have decided to acquiesce to this request and to cease working on the API.