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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.

PUBLISHED Reserved 2025-09-02 | Published 2025-09-17 | Updated 2025-09-17 | Assigner Wordfence




MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Problem types

CWE-352 Cross-Site Request Forgery (CSRF)

Product status

Default status
unaffected

* (semver)
affected

Timeline

2025-09-16:Disclosed

Credits

Jonas Benjamin Friedli finder

References

www.wordfence.com/...-6e07-42bd-9364-43367e209227?source=cve

plugins.trac.wordpress.org/...gs/1.0.1/mo-user-sync-main.php

plugins.trac.wordpress.org/...ser-sync&sfp_email=&sfph_mail=

cve.org (CVE-2025-9891)

nvd.nist.gov (CVE-2025-9891)

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