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

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Summary

CVECVE-2026-7761
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 08:16:24 UTC
Updated2026-06-24 21:16:58 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Ultimatemember Ultimate Member User Profile Registration Login Member Directory Content Restriction Membership Plugin affected 2.11.4 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/ultimate-member/trunk/includes/core/class-member-dire... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.4/includes/core/class-membe... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.4/includes/core/class-membe... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3569970 [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ultimate-member/trunk/includes/core/class-query.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ultimate-member/trunk/includes/core/class-member-dire... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/9aff7b03-4f03-434c-be87-b10ce... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.4/includes/core/class-query... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ultimate-member/trunk/includes/um-short-functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.4/includes/um-short-functio... [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Kevin Wydler (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-04T04:12:16.000ZVendor Notified
CNA2026-06-23T00:00:00.000ZDisclosed
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