User Registration & Membership <= 5.1.4 - Missing Authorization to Authenticated (Contributor+) Limited Page Content Modification

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Summary

CVECVE-2026-3601
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-05 09:16:03 UTC
Updated2026-05-05 09:16:03 UTC
DescriptionThe User Registration & Membership plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `embed_form_action()` function in all versions up to, and including, 5.1.4. This makes it possible for authenticated attackers, with Contributor-level access and above, to append shortcode content to arbitrary pages they do not own or have permission to edit.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/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]Primary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:N/AC:L/PR:L/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 5.1.4 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/user-registration/trunk/includes/class-ur-ajax.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/class-ur-ajax.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/c8798fb2-4cab-4960-9e32-fd74b... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/user-registration/trunk/includes/admin/class-ur-admin... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/admin/class-ur-... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3485702/user-registration/trunk/includes/class-ur-a... [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: Hunter Jensen (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-03-05T14:55:53.000ZVendor Notified
CNA2026-05-04T19:57:08.000ZDisclosed
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