function formatMessage(msg, output) {
  var output = output;
  output.parseTags = true;
  msg = output._parseTags(msg);
  output.parseTags = false;
  return msg;
}
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.