CVE-2025-9891

The User Sync – Remote User Sync plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0.2. This is due to missing or incorrect nonce validation on the mo_user_sync_form_handler() function. This makes it possible for unauthenticated attackers to deactivate the plugin via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://plugins.trac.wordpress.org/browser/user-sync/tags/1.0.1/mo-user-sync-main.php#L118
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3360328%40user-sync&new=3360328%40user-sync&sfp_email=&sfph_mail=
https://www.wordfence.com/threat-intel/vulnerabilities/id/6b60777e-6e07-42bd-9364-43367e209227?source=cve

Configurations

No configuration.

History

26 Sep 2026, 00:10

Type	Values Removed	Values Added
Summary		(es) El plugin User Sync - Remote User Sync para WordPress es vulnerable a la Cross-Site Request Forgery en todas las versiones hasta la 1.0.2, inclusive. Esto se debe a la validación de nonce ausente o incorrecta en la función mo_user_sync_form_handler(). Esto hace posible que atacantes no autenticados desactiven el 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.

Information

Published : 2025-09-17 02:15

Updated : 2026-09-26 00:10

NVD link : CVE-2025-9891

Mitre link : CVE-2025-9891

CVE.ORG link : CVE-2025-9891

JSON object : View

Products Affected

No product.

CWE

CWE-352

Cross-Site Request Forgery (CSRF)

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