Description

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.

INFO

Published Date :

2025-10-04T02:24:37.169Z

Last Modified :

2026-04-08T17:25:21.100Z

Source :

Wordfence
AFFECTED PRODUCTS

The following products are affected by CVE-2025-9485 vulnerability.

Vendors Products
Oauth Client Single Sign On Project
  • Oauth Client Single Sign On
Wordpress
  • Wordpress

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact