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Vulnerability record · CVE-2025-9485 · published 4 October 2025

CVE-2025-9485: Improper verification of cryptographic signature vulnerability

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.

9.8 CVSS 3.1 Critical EPSS 0.60% · top 53.5% CWE-347 · Improper verification of cryptographic signature Deferred
9.8CVSS 3.1 base score
0.60%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

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

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Source: NIST National Vulnerability Database (record CVE-2025-9485), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.