---
id: CVE-2026-115968
title: >-
  WordPress Ultimate Member plugin <= 2.13.1 - PHP Object Injection
  vulnerability
summary: >-
  Deserialization of Untrusted Data vulnerability in Ultimate Member Ultimate
  Member ultimate-member allows Object Injection.This issue affects Ultimate
  Member: from n/a through 2.13.1.
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-502
vendor: Ultimate Member
product: ultimate-member
affected:
  - ultimate-member <= 2.13.1
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-28T15:56:48.987963Z'
published: '2026-10-28'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T16:07:03.811Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115968'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/ultimate-member/vulnerability/wordpress-ultimate-member-plugin-2-13-1-php-object-injection-vulnerability?_s_id=cve
tags:
  - cve.org
ingestedAt: '2026-10-28T14:12:18.557Z'
---

## Overview

Deserialization of Untrusted Data vulnerability in Ultimate Member Ultimate Member ultimate-member allows Object Injection.This issue affects Ultimate Member: from n/a through 2.13.1.

## Affected

- `ultimate-member <= 2.13.1`

## Remediation

Update the WordPress Ultimate Member plugin to the latest available version (at least 2.14.0).