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CVE-2025-9485

🚨 CRITICAL

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 plugi...

Published
Oct 04, 2025
Last Modified
Oct 06, 2025
Views
83
Bookmarks
0

Description

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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.

CVSS Scores

CVSS 3.1 9.8
9.8
CRITICAL
CVSS 2.0 9.8

References

plugins.trac.wordpress.org plugins.trac.wordpress.org www.wordfence.com

Additional Information

Source
security@wordfence.com
State
Awaiting analysis

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