Because he's new here, and when new people wander in here looking for security vulnerabilities, it's usually because they've misunderstood what the site is about.

Also, he specifically asked for the latest security exploits -- if your goal is to learn rather than attack, it doesn't matter if a vulnerability has been fixed already. (In fact, it's better if it has, since that way you can see both how the attack works and how to prevent it.)