{"id":"CVE-2026-18056","title":"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","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 r…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-287"],"published":"2026-09-06","updated":"2026-09-08","sourceUpdated":"2026-09-08T13:12:58.310","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-18056","references":[{"url":"https://developers.facebook.com/docs/facebook-login/guides/advanced/manual-flow/#confirm","label":"security@wordfence.com"},{"url":"https://github.com/hivepress/hivepress-authentication/commit/f97d9109002905cf57597d15c535d1155dc64657","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/hivepress-authentication/tags/1.1.4/includes/components/class-facebook-authentication.php#L59","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/hivepress-authentication/tags/1.1.4/includes/controllers/class-authentication.php#L84","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset/3664231/hivepress-authentication","label":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/c0ba6392-e6f7-479a-8b9b-9cea4b140c71?source=cve","label":"security@wordfence.com"}],"tags":["nvd"],"epss":0.00342,"epssPercentile":0.27778,"ingestedAt":"2026-09-06T15:57:04.891Z","slug":"CVE-2026-18056","body":"## Overview\n\nThe 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}