User Registration & Membership <= 5.1.5 - Unauthenticated Missing Authorization to Admin Approval Bypass via 'action' Parameter

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Summary

CVECVE-2026-6145
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-14 09:16:26 UTC
Updated2026-05-14 09:16:26 UTC
DescriptionThe User Registration & Membership plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 5.1.5. This is due to the is_admin_creation_process() method relying solely on the presence of action=createuser in the $_REQUEST superglobal without performing any authentication or capability check. This makes it possible for unauthenticated attackers to bypass the admin approval requirement when registering new accounts via the fallback submission path.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wpeverest User Registration Membership Free Paid Memberships Subscriptions Content Restriction User Profile Custom User Registration Login Builder affected 5.1.5 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/changeset/3516468/user-registration/trunk/includes/class-ur-u... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/b6b349f2-24c9-4921-bb5f-a7726... [email protected] www.wordfence.com
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: Anthony Cihan (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-03-09T00:00:00.000ZDiscovered
CNA2026-04-12T13:35:18.000ZVendor Notified
CNA2026-05-13T19:52:48.000ZDisclosed
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