---
id: CVE-2025-11976
title: >-
  The FuseWP – WordPress User Sync to Email List & Marketing Automation
  (Mailchimp, Constant Contact, ActiveCampaign etc.) plugin for WordPress is
  vulnerable to Cross-Site Request Forgery in all versions up to, and including,
  1.1.23.0
summary: >-
  The FuseWP – WordPress User Sync to Email List & Marketing Automation
  (Mailchimp, Constant Contact, ActiveCampaign etc.) plugin for WordPress is
  vulnerable to Cross-Site Request Forgery in all versions up to, and including,
  1.1.23.0. Thi…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-352
published: '2025-10-25'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-11976'
references:
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3383939/fusewp/trunk/src/core/src/Admin/SettingsPage/SyncPage.php
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/e5957d6b-40e5-44c4-9a1b-e9c49e175162?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00136
epssPercentile: 0.02596
ingestedAt: '2026-10-08T11:31:27.584Z'
---

## Overview

The FuseWP – WordPress User Sync to Email List & Marketing Automation (Mailchimp, Constant Contact, ActiveCampaign etc.) plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.1.23.0. This is due to missing or incorrect nonce validation on the save_changes function. This makes it possible for unauthenticated attackers to add or edit sync rules via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

## Remediation

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