{"id":"CVE-2026-93428","published":"2026-10-03T03:16:37.067","lastModified":"2026-10-06T15:04:52.637","description":"The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.13.1 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to view privacy-restricted member profile field values — including fields explicitly configured as owner-only, members-only, or role-restricted — by querying the publicly accessible wp_ajax_nopriv_um_get_members endpoint. The nonce required by the endpoint ('um-frontend-nonce') is emitted to all unauthenticated visitors via wp_localize_script, meaning it provides no meaningful access control and any anonymous visitor can satisfy the endpoint's authentication requirements.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwes":["CWE-862"],"vendors":[],"products":[],"references":[{"url":"https://github.com/ultimatemember/ultimatemember/releases/tag/2.14.0","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/class-ajax-common.php#L61","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/class-fields.php#L144","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/class-member-directory.php#L2795","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/class-member-directory.php#L2839","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/um-actions-profile.php#L1319","tags":[]},{"url":"https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/um-short-functions.php#L1579","tags":[]},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/cde81421-e080-4530-87a5-6515f1c9800b?source=cve","tags":[]}],"exploitRefs":[{"url":"https://github.com/ultimatemember/ultimatemember/releases/tag/2.14.0","tags":[]}],"hasPoc":true,"ai":{"summary":"The Ultimate Member WordPress plugin fails to properly verify user authorization when accessing member profile fields, allowing unauthenticated attackers to view privacy-restricted data through the wp_ajax_nopriv_um_get_members endpoint. This authorization bypass affects all versions up to 2.13.1 and exposes sensitive member information including owner-only, members-only, and role-restricted fields.","exploitability":"Exploitation is straightforward with no prerequisites - attackers can directly query the publicly accessible endpoint without authentication, as the required nonce is exposed to all visitors via wp_localize_script.","blast_radius":"The impact could be significant across all WordPress sites using the Ultimate Member plugin version 2.13.1 or earlier, potentially exposing private member profile information to anonymous users.","remediation":"Upgrade to version 2.13.2 or later to address this authorization bypass vulnerability.","detection":"Monitor for unauthorized access attempts to wp_ajax_nopriv_um_get_members endpoint in web server logs, particularly GET requests with um_get_members action parameter, and watch for unusual traffic patterns to the /wp-admin/admin-ajax.php endpoint from unauthenticated users.","tags":["auth-bypass","wordpress","privilege-escalation","profile-data"],"model":"garnet-coder","analyzedAt":"2026-10-12T09:02:04.332Z"}}