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CVE-2026-18056

HIGH 7.5 CVSS 3.1
Published
September 6, 2026
Last modified
September 8, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-287
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Description

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.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • hivepress HivePress Authentication — Up to and including 1.1.4

References

  • developers.facebook.com https://developers.facebook.com/docs/facebook-login/guides/advanced/manual-flow/#confirm
  • github.com https://github.com/hivepress/hivepress-authentication/commit/f97d9109002905cf57597d15c535d1155dc64657
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/hivepress-authentication/tags/1.1.4/includes/components/class-facebook-authentication.php#L59
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/hivepress-authentication/tags/1.1.4/includes/controllers/class-authentication.php#L84
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3664231/hivepress-authentication
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/c0ba6392-e6f7-479a-8b9b-9cea4b140c71?source=cve
  • nvd.nist.gov Official NVD record