Headless SSO Plugin for WP <= 1.7.0 — Unauthenticated Arbitrary Account Takeover
CVE-2026-62108Published · Updated Action summary
Affected: ≤1.7.0Update to 1.7.1 or newer
All remediation steps- Severity
- High7.3
- CVSS
- 7.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:LWhat 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:LIntegrity- Low
A:LAvailability- Low
- Weakness
- CWE-287 Improper Authentication
- Required access
- No account needed
- Exploit prediction (EPSS)
- 0.6% chance in 30 days49th percentile
- CISA KEV
- Not listed
On this page8
Am I affected?
Headless SSO Plugin for WP headless-single-sign-on
- Affected≤ 1.7.0
- Patched in1.7.1
Update to 1.7.1 or newer.
You are affected if you run ≤ 1.7.0. Version 1.7.1 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Headless SSO Plugin for WP.
- 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 1.7.1, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Headless SSO Plugin for WP to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Joost Grunwald.
The Headless SSO Plugin for WP plugin for WordPress is vulnerable to Account Takeover in all versions up to, and including, 1.7.0. This is due to a flawed account-matching condition that reduced to `username_exists($userName)` regardless of the configured matcher, allowing an IdP-asserted username to match any existing WordPress account unconditionally. This makes it possible for unauthenticated attackers to log in as any existing WordPress user, including administrators, by asserting a matching username in a crafted SAML response regardless of the configured account-matcher setting.
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 Headless SSO Plugin for WP
All 3| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High8.1 | Unauthenticated PHP Object Injection ≤1.6Update to 1.6.1 | CVE-2026-28149 | |
| Medium5.3 | Missing Authorization ≤1.6Update to 1.6.1 | CVE-2026-28148 |
- High8.1Unauthenticated PHP Object Injection
≤1.6Update to 1.6.1
- Medium5.3Missing Authorization
≤1.6Update to 1.6.1
Timeline
CVE published
Severity high, CVSS 7.3
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.
- EPSS
- Exploit Prediction Scoring System by FIRST.org.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.