The AskAny WordPress plugin before 2.2.1 does not verify that a chat session belongs to the...

The AskAny WordPress plugin before 2.2.1 does not verify that a chat session belongs to the requester before returning or changing it, allowing unauthenticated users who obtain or guess another visitor's session identifier to read that visitor's chat transcript, name, email address and IP address, and to add messages to their conversation or overwrite their details.