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CVE-2026-7761— Ultimate Member <= 2.11.4 - Authenticated (Contributor+) Account Takeover via Password Reset Link Disclosure

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.

Ultimate Member Ultimate Member是Ultimate Member团队的一款用户会员管理插件。 Ultimate Member Ultimate Member2.11.4及之前版本存在授权问题漏洞，该漏洞源于一系列逻辑漏洞：MD5哈希回退、strstr()解析逻辑缺陷以及字段名验证缺失，可能导致经过身份验证的攻击者通过泄露密码重置链接实现账户接管。

CVSS 8.8 · High EPSS 0.72% · P53
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I. Basic Information for CVE-2026-7761

Vulnerability Information
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Vulnerability Title
Ultimate Member <= 2.11.4 - Authenticated (Contributor+) Account Takeover via Password Reset Link Disclosure
Source: CVE Program / CVE List V5
Vulnerability Description
The Ultimate Member plugin for WordPress is vulnerable to Account Takeover via Password Reset Link Disclosure in all versions up to and including 2.11.4. This is due to a chain of three logic bugs: (1) an MD5 hash fallback in get_directory_by_hash() that allows any post to be used as a member directory by computing SUBSTRING(MD5(post_id), 11, 5), (2) a strstr() parsing logic flaw in post_data() that allows bypassing WordPress's protected meta key restrictions by placing '_um_' anywhere in the meta key name rather than at the start, and (3) missing field name validation in build_user_card_data() that allows arbitrary field names including 'password_reset_link' to be passed to um_filtered_value(). This makes it possible for authenticated attackers with Contributor-level access and above to create a malicious post via XMLRPC with crafted meta fields, use the MD5 fallback to point the member directory AJAX handler to their post, inject 'password_reset_link' into the tagline_fields configuration, and leak live password reset URLs for all users in the member directory response, including administrators.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Ultimate Member Ultimate Member授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ultimate Member Ultimate Member是Ultimate Member团队的一款用户会员管理插件。 Ultimate Member Ultimate Member2.11.4及之前版本存在授权问题漏洞，该漏洞源于一系列逻辑漏洞：MD5哈希回退、strstr()解析逻辑缺陷以及字段名验证缺失，可能导致经过身份验证的攻击者通过泄露密码重置链接实现账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin 0 ~ 2.11.4 -

II. Public POCs for CVE-2026-7761

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III. Intelligence Information for CVE-2026-7761

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Patches & Fixes for CVE-2026-7761 (2)

Other References for CVE-2026-7761 (1)

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-2026-7761

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