Vulnerability · Published Sep 17, 2025 · Assigned by Wordfence
CVE-2025-9891User Sync – Remote User Sync <= 1.0.2 - Cross-Site Request Forgery to Plugin Deactivation
Medium 4.3
In plain English
A medium-severity cross-site request forgery in User Sync from cyberlord92. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| cyberlord92 | User Sync | 0 – through 1.0.2 |
Weakness: CWE-352 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/6b60777e-6e07-42bd-9364-43367e209227?source=cve
- 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=