CVE-2026-28138 HIGH

CVE-2026-28138: WordPress uListing plugin <= 2.2.0 - PHP Object Injection vulnerability

Vendor Stylemix
Product uListing
Weakness CWE-502 · Unsafe deserialization
Published February 26, 2026
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

7.2/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Deserialization of Untrusted Data vulnerability in Stylemix uListing ulisting allows Object Injection.This issue affects uListing: from n/a through <= 2.2.0.

Explanation of Vulnerability in Simple Terms

02Summary

uListing versions up to 2.2.0 contain a deserialization vulnerability that allows high-privilege users to execute arbitrary code on the site. An attacker with administrative access can craft malicious serialized data that, when processed by the application, runs their own PHP code. This requires admin-level credentials and affects confidentiality, integrity, and availability.

What an attacker can do

03Attacker Capabilities

Run arbitrary PHP code on the site with full server privileges.

Potential impact on your site

04Site Impact

An admin account compromise could lead to complete site takeover, data theft, and malware installation.

Conditions required to exploit

05Prerequisites

Attacker must have high-level administrative access to the uListing application.

Key dates

06Disclosure timeline

February 26, 2026 CVE published
April 28, 2026 Record updated

Related vulnerabilities

08Related CVE

CVE-2026-12240 Export User Data <= 2.2.6 - Authenticated (Subscriber+) PHP Object Injection to Arbitrary File Deletion via display_name Field CVE-2026-0551 PPWP – Password Protect Pages <= 1.9.18 - Authenticated (Contributor+) PHP Object Injection via post_protection_roles CVE-2026-49763 WordPress Integration for Contact Form 7 HubSpot plugin <= 1.3.7 - PHP Object Injection vulnerability CVE-2026-49770 WordPress WP Travel Engine plugin <= 6.7.12 - PHP Object Injection vulnerability CVE-2026-4703 WS Form LITE <= 1.10.80 - Unauthenticated PHP Object Injection via Form Submission