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CVE-2026-93428— Ultimate Member <= 2.13.1 - Missing Authorization to Unauthenticated Sensitive Profile Field Disclosure via Member Directory Field Privacy Bypass

Quick assessment

Affected
ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件“Ultimate Member – 用户资料、注册、登录、会员目录、内容限制与会员资格管理”在所有 2.13.1 及更早版本中存在授权绕过漏洞。该漏洞源于插件未能正确验证用户是否具备执行某项操作的权限。攻击者无需身份认证，即可通过查询公开可访问的 端点，获取隐私受限的会员资料字段值，包括那些明确配置为“仅限所有者”、“仅限会员”或“按角色限制”的字段。 该端点所需的非ces（nonce）参数 会通过 向所有未认证访客公开提供。由于该 nonce 并未提供实质性的访问控制机制，任何匿名访问者

CVSS 7.5 · High
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I. Basic Information for CVE-2026-93428

Vulnerability Information
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Vulnerability Title
Ultimate Member <= 2.13.1 - Missing Authorization to Unauthenticated Sensitive Profile Field Disclosure via Member Directory Field Privacy Bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin 0 ~ 2.13.1 -

II. Public POCs for CVE-2026-93428

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III. Intelligence Information for CVE-2026-93428

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Other References for CVE-2026-93428 (8)

IV. Related Vulnerabilities

Same product: Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Same vendor: ultimatemember
Same weakness: CWE-862

V. Comments for CVE-2026-93428

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