    rules.push({tag: tagPair(['a']), re: /(?<=\s|^)#[a-zA-Z][\w.-]+(?=\W|$)/, rules: [], handler: '_mdChannelname'});

    return rules;
  }
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.