CVE-2026-5127

HIGH EPSS 56.8%

Published May 8, 20261mo ago · Modified Jun 17, 20261w ago

8.8 CVSS 3.1

High

Published May 8, 2026 1mo ago

Last Modified Jun 17, 2026 1w ago

Description

The 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.

CVSS Details

Base Score

8.8

Exploitability

2.8

Impact

5.9

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality High

Integrity High

Availability High

Threat Intelligence

EPSS Exploit Probability

56.8% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-502 Deserialization of Untrusted Data Validation

References 19

plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Ajax/Frontend_Form_Ajax.php#L35
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Ajax/Frontend_Form_Ajax.php#L36
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Traits/FieldableTrait.php#L429
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Traits/FieldableTrait.php#L502
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Traits/FieldableTrait.php#L679
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/includes/Traits/FieldableTrait.php#L704
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/wpuf-functions.php#L1103
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.2.10/wpuf-functions.php#L959
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Ajax/Frontend_Form_Ajax.php#L35
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Ajax/Frontend_Form_Ajax.php#L36
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Traits/FieldableTrait.php#L429
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Traits/FieldableTrait.php#L502
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Traits/FieldableTrait.php#L679
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/includes/Traits/FieldableTrait.php#L704
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/wpuf-functions.php#L1103
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/wp-user-frontend/trunk/wpuf-functions.php#L959
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3514258/wp-user-frontend/trunk/includes/Traits/FieldableTrait.php
plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?old_path=%2Fwp-user-frontend/tags/4.3.1&new_path=%2Fwp-user-frontend/tags/4.3.2
wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/2b5d27cc-c6eb-4c5c-8ee1-30483b91c6fd?source=cve

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.