  def scope_allowed_tags(tags)
    Rails::Html::WhiteListSanitizer.allowed_tags = tags
    yield Rails::Html::WhiteListSanitizer.new

  ensure
    Rails::Html::WhiteListSanitizer.allowed_tags = nil
  end
The software 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.