User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration <= 4.3.1 - Authenticated (Subscriber+) PHP Object Injection

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-5127
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 09:16:08 UTC
Updated2026-05-08 09:16:08 UTC
DescriptionThe User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration plugin for WordPress is vulnerable to Deserialization of Untrusted Data in versions up to, and including, 4.3.1 This is due to insufficient input validation and type checking on the wpuf_files parameter during form submission, combined with unconditional deserialization via maybe_unserialize() when displaying post content. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary PHP objects, which can be leveraged to execute arbitrary code, delete arbitrary files, or perform other malicious actions if a POP chain is present on the target system.

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-502 | CWE-502 CWE-502 Deserialization of Untrusted Data

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS: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 Wedevs User Frontend AI Powered Frontend Posting User Directory Profile Membership User Registration affected 4.3.1 semver Not specified

References

ReferenceSourceLinkTags
www.wordfence.com/threat-intel/vulnerabilities/id/2b5d27cc-c6eb-4c5c-8ee1-30483... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Ajax/Frontend_F... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/wpuf-functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/wpuf-functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Traits/Fieldabl... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Traits/FieldableTrait... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Ajax/Frontend_Form_Aj... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Traits/Fieldabl... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/wpuf-functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Ajax/Frontend_Form_Aj... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Traits/FieldableTrait... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3514258/wp-user-frontend/trunk/includes/Traits/Fiel... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Ajax/Frontend_F... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/wpuf-functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Traits/Fieldabl... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Traits/FieldableTrait... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Traits/Fieldabl... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Traits/FieldableTrait... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [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: Doan Dinh Van (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-03-30T09:21:38.000ZVendor Notified
CNA2026-05-07T19:58:37.000ZDisclosed
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