Headless SSO Plugin for WP <= 1.7.0 - Unauthenticated Arbitrary Account Takeover
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Headless SSO Plugin for WP | <= 1.7.0 | 1.7.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
CWE-287- Platform
- WordPress
- Package
Headless SSO Plugin for WP- Disclosed
- 15.09.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 70235939-87d3-464b-9884-c5b322614f51 - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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Vulnerability history: Headless SSO Plugin for WP
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 3
- First → latest
- 08.2026 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 1
Disclosures per year
- 2026: 3
-
Headless SSO Plugin for WP <= 1.7.0 - Unauthenticated Arbitrary Account Takeover this entry
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