CVE-2025-9485
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-04

Last updated on: 2025-10-06

Assigner: Wordfence

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.
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Meta Information
Published
2025-10-04
Last Modified
2025-10-06
Generated
2026-06-16
AI Q&A
2025-10-04
EPSS Evaluated
2026-06-15
NVD
CVE-2025-9485
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
wordpress oauth_single_sign_on 6.26.12
wordpress miniorange-login-with-eve-online-google-facebook 6.26.12
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-347 The product does not verify, or incorrectly verifies, the cryptographic signature for data.
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Executive Summary

This vulnerability exists in the OAuth Single Sign On – SSO (OAuth Client) plugin for WordPress, versions up to and including 6.26.12. It is caused by improper verification of cryptographic signatures in the plugin's JWT token processing, specifically in the get_resource_owner_from_id_token function. Because the plugin does not properly verify or validate JWT tokens, unauthenticated attackers can exploit this flaw to bypass authentication.

Impact Analysis

An attacker exploiting this vulnerability can gain unauthorized access to any existing user account on the affected WordPress site, including administrator accounts in some configurations. Additionally, attackers can create arbitrary subscriber-level accounts. This can lead to full compromise of the site, including data theft, site manipulation, and denial of service.

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