void OutOfProcessInstance::ScrollToPage(int page) {
  if (engine_->GetNumberOfPages() == 0)
    return;

  pp::VarDictionary message;
  message.Set(kType, kJSGoToPageType);
  message.Set(kJSPageNumber, pp::Var(page));
  PostMessage(message);
}

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.