---
id: CVE-2026-96567
title: >-
  The MW WP Form plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the 'post_id' parameter in all versions up to, and including,
  5.1.7 due to insufficient input sanitization and output escaping
summary: >-
  The MW WP Form plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the 'post_id' parameter in all versions up to, and including,
  5.1.7 due to insufficient input sanitization and output escaping. This makes
  it possible f…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: websoudan
product: MW WP Form
affected:
  - mw_wp_form <= 5.1.7
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T13:18:55.613'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-96567'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/mw-wp-form/tags/5.1.6/classes/models/class.contact-data-setting.php#L200
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/mw-wp-form/tags/5.1.6/classes/models/class.parser.php#L156
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/mw-wp-form/tags/5.1.6/classes/models/class.parser.php#L208
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/mw-wp-form/tags/5.1.6/classes/services/class.exec-shortcode.php#L122
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/mw-wp-form/tags/5.1.6/classes/services/class.exec-shortcode.php#L151
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3715473%40mw-wp-form&new=3715473%40mw-wp-form
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/060ff51b-536d-4022-a68a-f77dc6c9c814?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T08:14:06.222Z'
---

## Overview

The MW WP Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'post_id' parameter in all versions up to, and including, 5.1.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The CSRF gate protecting form submission (MW_WP_Form_Csrf) is bypassable by any unauthenticated visitor who first loads the public form page to obtain a valid double-submit cookie, leaving no effective barrier to storing malicious payloads.

## Remediation

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