Improper authentication in HivePress Authentication
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.
Summary
The HivePress Authentication plugin for WordPress is vulnerable to Authentication Bypass via the access_token parameter in all versions up to, and including, 1.1.4. This is due to the authenticate_user function's Facebook authenticator resolving third-party identity by forwarding the attacker-supplied access_token to the Facebook Graph API and trusting the returned email and ID verbatim, without performing any application ID or audience validation — specifically, no /debug_token verification and no comparison of the token's app_id against the configured hp_facebook_app_id. This makes it possible for unauthenticated attackers to authenticate as any existing WordPress user, including administrators, whose email address is associated with a Facebook account for which the attacker can obtain any valid access token. Important Note: To exploit the vulnerability, the attacker must obtain the victim's access token.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-18056
- 2026-10-03 Alias added: GHSA-55w6-5hh5-wj3r
References
Other 6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c0ba6392-e6f7-479a-8b9b-9cea4b140c71?source=cve
- https://developers.facebook.com/docs/facebook-login/guides/advanced/manual-flow/#confirm
- https://plugins.trac.wordpress.org/browser/hivepress-authentication/tags/1.1.4/includes/components/class-facebook-authentication.php#L59
- https://plugins.trac.wordpress.org/browser/hivepress-authentication/tags/1.1.4/includes/controllers/class-authentication.php#L84
- https://github.com/hivepress/hivepress-authentication/commit/f97d9109002905cf57597d15c535d1155dc64657
- https://plugins.trac.wordpress.org/changeset/3664231/hivepress-authentication
More HivePress vulnerabilities
- TI-2026-76304 HivePress WordPress plugin remote code execution (RCE) vulnerability CVSS 3.1CRITICAL 9.9
- TI-2026-86529 Missing authorization in HivePress WordPress plugin CVSS 3.1MEDIUM 4.3
- TI-2026-75264 Stored cross-site scripting in HivePress via custom user attributes CVSS 3.1HIGH 7.2
- TI-2026-70282 Stored cross-site scripting in HivePress plugin for WordPress CVSS 3.1HIGH 7.2
- TI-2026-76059 Code injection in WordPress HivePress plugin CVSS 3.1MEDIUM 6.5
- TI-2026-75267 Stored cross-site scripting in HivePress plugin for WordPress CVSS 3.1MEDIUM 6.4
Sources
- CVE-2026-18056 · CVE Program
- CVE-2026-18056 · NVD
- FIRST EPSS
- GHSA-55w6-5hh5-wj3r · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences