pixiv: Bypassing Inbox Privacy Settings and Enabling Spam on Pixiv.net

A vulnerability was discovered in the messaging system of Pixiv.net. The vulnerability allowed any user to bypass the inbox privacy settings and send messages to another user who had disabled their inbox. The vulnerability was triggered by manipulating the id parameter in the message-sending POST...

How to Limit Who Can Contact You on Facebook

You don't want just anyone in your inbox. Here's how to take control...