---
id: CVE-2026-118167
title: >-
  MC4WP: Mailchimp for WordPress < 4.15.0 - Unauthenticated Subscription
  Audience Override
summary: >-
  The MC4WP: Mailchimp for WordPress plugin before 4.15.0 does not validate that
  the Mailchimp audience a sign-up form or bundled integration subscribes a
  visitor to matches the audience configured by the site owner, allowing
  unauthenticat…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cvssSource: adp
cwe:
  - CWE-863
product: 'MC4WP: Mailchimp for WordPress'
affected:
  - mc4wp_mailchimp_for_wordpress < 4.15.0
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-06T11:46:53.025620Z'
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T11:59:40.340Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-118167'
references:
  - url: 'https://wpscan.com/vulnerability/11752539-1dc8-4adb-a680-ce7ecaaff4d1/'
tags:
  - cve.org
ingestedAt: '2026-11-06T06:46:27.273Z'
epss: 0.00214
epssPercentile: 0.11809
---

## Overview

The MC4WP: Mailchimp for WordPress plugin before 4.15.0 does not validate that the Mailchimp audience a sign-up form or bundled integration subscribes a visitor to matches the audience configured by the site owner, allowing unauthenticated visitors to subscribe arbitrary email addresses to any other audience in the site's connected Mailchimp account.

## Affected

- `mc4wp_mailchimp_for_wordpress < 4.15.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.