CVE-2026-93428
Received Received - Intake

Authorization Bypass in Ultimate Member WordPress Plugin

Publication date: 2026-10-03

Last updated on: 2026-10-03

Assigner: Wordfence

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.

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Meta Information

Published
2026-10-03
Last Modified
2026-10-03
Generated
2026-10-03
AI Q&A
2026-10-03
EPSS Evaluated
N/A
NVD
CVE-2026-93428
EUVD
EUVD-2026-91881

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
ultimatemember ultimate_member to 2.13.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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Executive Summary

This vulnerability is an authorization bypass in the Ultimate Member WordPress plugin affecting versions up to 2.13.1. It allows unauthenticated attackers to view private member profile fields by exploiting a publicly accessible endpoint. The issue occurs because the plugin fails to properly verify user authorization before displaying sensitive data.

Detection Guidance

Check if the Ultimate Member plugin version is below 2.14.0. Inspect network traffic for requests to the wp_ajax_nopriv_um_get_members endpoint. Look for unauthorized access to privacy-restricted profile fields via this endpoint.

Impact Analysis

Attackers could access private profile fields including owner-only, members-only, or role-restricted data without authentication. This exposes sensitive user information such as email addresses, personal details, or other confidential fields configured as private in member profiles.

Compliance Impact

This vulnerability likely violates privacy regulations like GDPR and HIPAA by exposing protected personal data without proper authorization. It enables unauthorized access to sensitive user information, which could result in non-compliance with data protection requirements.

Mitigation Strategies

Immediately update the Ultimate Member plugin to version 2.14.0 or later. Review and restrict access to member profile fields. Monitor for unauthorized access attempts to the affected endpoint.

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