WordPress Single Sign-On (SSO) — Multiple Versions - Incorrect Authorization to Sensitive Information Exposure
CVE-2025-6003Published · Updated Action summary
Affected: ≤18.5.3Update to 18.5.4 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:NIntegrity- None
A:NAvailability- None
- Weakness
- CWE-863 Incorrect Authorization
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
WordPress Single Sign-On (SSO) - Multisite Enterprise miniorange-oauth-oidc-single-sign-on
- Affected≤ 18.5.3
- Patched in18.5.4
Update to 18.5.4 or newer.
You are affected if you run ≤ 18.5.3. Version 18.5.4 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WordPress Single Sign-On (SSO) - Multisite Enterprise.
- 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 18.5.4, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch WordPress Single Sign-On (SSO) - Multisite Enterprise to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Israël Hallé (Flare).
The WordPress Single Sign-On (SSO) plugin for WordPress is vulnerable to unauthorized access due to a misconfigured capability check on a function in all versions up to, and including, the *.5.3 versions of the plugin. This makes it possible for unauthenticated attackers to extract sensitive data including site content that has been restricted to certain users and/or roles.
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 WordPress Single Sign-On (SSO) - Multisite Enterprise
All 2| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.3 | Multisite Premium <= 38.5.8 - Missing Authorization ≤38.5.8Update to 38.5.8.1 | CVE-2026-57807 |
- Medium5.3Multisite Premium <= 38.5.8 - Missing Authorization
≤38.5.8Update to 38.5.8.1
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. 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.