CVE-2025-9485

The OAuth Single Sign On – SSO (OAuth Client) plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 6.26.12. This is due to the plugin performing unsafe JWT token processing without verification or validation in the `get_resource_owner_from_id_token` function. This makes it possible for unauthenticated attackers to bypass authentication and gain access to any existing user account - including administrators in certain configurations - or to create arbitrary subscriber-level accounts.

Score

CVSS 3.1 9.8 Critical

Status

Deferred - security@wordfence.com

Published

2025-10-04

Last modified

2026-10-11

Weaknesses

CWE-347

Affected products

• Oauth Single Sign On Sso Oauth Client (Cyberlord92)

References

• https://www.wordfence.com/threat-intel/vulnerabilities/id/d2448afc-70d1-4dd5-b73b-62d182ee9a8a?source=cve
• https://plugins.trac.wordpress.org/browser/miniorange-login-with-eve-online-google-facebook/tags/6.26.12/class-mooauth-…
• https://plugins.trac.wordpress.org/changeset/3360768/miniorange-login-with-eve-online-google-facebook