static int CornerStart(const LayoutBox& box,
                       int min_x,
                       int max_x,
                       int thickness) {
  if (box.ShouldPlaceBlockDirectionScrollbarOnLogicalLeft())
    return min_x + box.StyleRef().BorderLeftWidth();
  return max_x - thickness - box.StyleRef().BorderRightWidth();
}

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.