OAuth Single Sign On – SSO (OAuth Client) <= 6.26.12 — Authentication Bypass via get_resource_owner_from_id_token()
CVE-2025-9485Published · Updated Action summary
Affected: ≤6.26.12Update to 6.26.13 or newer
All remediation steps- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
OAuth Single Sign On – SSO (OAuth Client) miniorange-login-with-eve-online-google-facebook
- Affected≤ 6.26.12
- Patched in6.26.13
Update to 6.26.13 or newer.
You are affected if you run ≤ 6.26.12. Version 6.26.13 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under OAuth Single Sign On – SSO (OAuth Client).
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 6.26.13, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch OAuth Single Sign On – SSO (OAuth Client) to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Jonas Benjamin Friedli.
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in OAuth Single Sign On – SSO (OAuth Client)
All 14| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Critical9.8 | Unauthenticated Privilege Escalation ≤7.1.3Update to 7.1.4 | CVE-2026-120844 | |
| Medium5.3 | Unauthenticated Authentication Bypass ≤7.1.2Update to 7.1.3 | CVE-2026-97274 | |
| High7.3 | Unauthenticated Arbitrary User Account Takeover ≤7.0.0Update to 7.0.1 | CVE-2026-82183 | |
| Medium5.3 | Missing Authorization ≤7.0.0Update to 7.0.1 | CVE-2026-28008 | |
| Medium5.3 | Missing Authorization ≤6.26.14Update to 6.26.15 | CVE-2025-10753 |
- Critical9.8Unauthenticated Privilege Escalation
≤7.1.3Update to 7.1.4
- Medium5.3Unauthenticated Authentication Bypass
≤7.1.2Update to 7.1.3
- High7.3Unauthenticated Arbitrary User Account Takeover
≤7.0.0Update to 7.0.1
- Medium5.3Missing Authorization
≤7.0.0Update to 7.0.1
- Medium5.3Missing Authorization
≤6.26.14Update to 6.26.15
Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.