PT-2025-38104 · WordPress · User Sync – Remote User Sync

Jonas Benjamin Friedli · Published 2025-09-17 · Updated 2025-09-17 · CVE-2025-9891

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions User Sync – Remote User Sync plugin for WordPress versions prior to 1.0.3

Description The User Sync – Remote User Sync plugin for WordPress is susceptible to Cross-Site Request Forgery. This is due to missing or incorrect nonce validation in the mo user sync form handler() function, potentially allowing unauthenticated attackers to deactivate the plugin by tricking a site administrator into performing an action.

Recommendations Update the User Sync – Remote User Sync plugin to version 1.0.3 or later.

Fix

CSRF

Weakness Enumeration

CWE-352

Related Identifiers

CVE-2025-9891

Affected Products

User Sync – Remote User Sync

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2025-9891 · Security Note
• https://twitter.com/CVEnew/status/1968190748290945436 · Twitter Post
• https://wordfence.com/threat-intel/vulnerabilities/id/6b60777e-6e07-42bd-9364-43367e209227?source=cve · Note
• https://plugins.trac.wordpress.org/browser/user-sync/tags/1.0.1/mo-user-sync-main.php#L118 · Note
• https://twitter.com/VulmonFeeds/status/1968165393911919085 · Twitter Post
• https://t.me/CVEtracker/32710 · Telegram Post
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3360328%40user-sync&new=3360328%40user-sync&sfp_email=&sfph_mail= · Note