Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/user-sync/tags/1.0.1/mo-user-sync-mai
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old
- https://www.wordfence.com/threat-intel/vulnerabilities/id/6b60777e-6e07-42bd-936
FAQ
What is CVE-2025-9891?
CVE-2025-9891 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 t...
How severe is CVE-2025-9891?
CVE-2025-9891 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-9891?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.