by Kastro
Paper/Archive/CVE-2025-9485

CVE-2025-9485

cyberlord92 OAuth Single Sign On – SSO (OAuth Client) — OAuth Single Sign On – SSO (OAuth Client) <= 6.26.12 - Authentication Bypass via get_resource_owner_from_id_token()

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
39
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 48.7.487 × 209.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
OAuth Single Sign On – SSO (OAuth Client)≤ 6.26.12–CNA

Scores by source

Wordfence (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refwordfence.com/threat-intel/vulnerabilities/id/d2448afc-70d1-4dd5-b73b-62d182ee9a8a?source=cverefplugins.trac.wordpress.org/browser/miniorange-login-with-eve-online-google-facebook/tags/6.26.12/class-mooauth-widget.php#L577refplugins.trac.wordpress.org/changeset/3360768/miniorange-login-with-eve-online-google-facebook