{"id":"CVE-2026-18056","aliases":["EUVD-2026-72043","GHSA-55w6-5hh5-wj3r"],"status":"published","title":"HivePress Authentication \u003c= 1.1.4 - Unauthenticated Authentication Bypass via 'access_token' Parameter to Facebook Authenticator","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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00572,"percentile":0.47815,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2026-09-06T02:26:51Z","modified":"2026-10-28T02:30:43Z","products":[{"vendor":"hivepress","product":"hivepress authentication"}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/c0ba6392-e6f7-479a-8b9b-9cea4b140c71?source=cve","tags":["web"]},{"url":"https://developers.facebook.com/docs/facebook-login/guides/advanced/manual-flow/#confirm","tags":["web"]},{"url":"https://plugins.trac.wordpress.org/browser/hivepress-authentication/tags/1.1.4/includes/components/class-facebook-authentication.php#L59","tags":["web"]},{"url":"https://plugins.trac.wordpress.org/browser/hivepress-authentication/tags/1.1.4/includes/controllers/class-authentication.php#L84","tags":["web"]},{"url":"https://github.com/hivepress/hivepress-authentication/commit/f97d9109002905cf57597d15c535d1155dc64657","tags":["fix"]},{"url":"https://plugins.trac.wordpress.org/changeset/3664231/hivepress-authentication","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18056","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-55w6-5hh5-wj3r"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18056.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-18056","title":"HivePress Authentication \u003c= 1.1.4 - Unauthenticated Authentication Bypass via 'access_token' Parameter to Facebook Authenticator","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.","status":"published","published":"2026-09-06T02:26:51.649Z","modified":"2026-09-07T11:17:23.315Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:20:12.60856Z"}],"euvd":[{"id":"EUVD-2026-72043","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.","status":"published","published":"2026-09-06T02:26:51Z","modified":"2026-09-07T11:17:23Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T17:28:30.668645Z"}],"ghsa":[{"id":"GHSA-55w6-5hh5-wj3r","title":"The HivePress Authentication plugin for WordPress is vulnerable to Authentication Bypass via the...","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.","status":"published","published":"2026-09-06T03:30:24Z","modified":"2026-09-06T03:30:30Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:11:24.999449Z"}],"nvd":[{"id":"CVE-2026-18056","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.","status":"published","published":"2026-09-06T03:17:16.467Z","modified":"2026-09-08T13:12:58.31Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:12:44.082631Z"}],"osv":[{"id":"CVE-2026-18056","title":"HivePress Authentication \u003c= 1.1.4 - Unauthenticated Authentication Bypass via 'access_token' Parameter to Facebook Authenticator","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.","status":"published","published":"2026-09-06T02:26:51.649Z","modified":"2026-10-28T02:30:43.380139475Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:44:58.024074Z"}]}}