bool MimeHandlerViewContainer::OnMessage(const IPC::Message& message) {
  bool handled = true;
  IPC_BEGIN_MESSAGE_MAP(MimeHandlerViewContainer, message)
  IPC_MESSAGE_HANDLER(ExtensionsGuestViewMsg_CreateMimeHandlerViewGuestACK,
                      OnCreateMimeHandlerViewGuestACK)
  IPC_MESSAGE_HANDLER(
      ExtensionsGuestViewMsg_MimeHandlerViewGuestOnLoadCompleted,
      OnMimeHandlerViewGuestOnLoadCompleted)
  IPC_MESSAGE_HANDLER(GuestViewMsg_GuestAttached, OnGuestAttached)
  IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP()
  return handled;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.