CVE-2025-9891

MEDIUM

User Sync < 1.0.2 - Cross-Site Request Forgery via mo_user_sync_form_handler()

Title source: llm

Description

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.

References (3)

Core 3

Core References

Product

https://plugins.trac.wordpress.org/browser/user-sync/tags/1.0.1/mo-user-sync-main.php#L118

Product

https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3360328%40user-sync&new=3360328%40user-sync&sfp_email=&sfph_mail=

Third Party Advisory

https://www.wordfence.com/threat-intel/vulnerabilities/id/6b60777e-6e07-42bd-9364-43367e209227?source=cve

Scores

CVSS v3 4.3

EPSS 0.0019

EPSS Percentile 8.3%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-352

Status published

Products (1)

cyberlord92/User Sync < 1.0.2

Published Sep 17, 2025

Tracked Since Feb 18, 2026