CVE-2026-96567
Received Received - Intake

Stored XSS in MW WP Form WordPress Plugin

Publication date: 2026-10-02

Last updated on: 2026-10-02

Assigner: Wordfence

Description
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.

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Meta Information

Published
2026-10-02
Last Modified
2026-10-02
Generated
2026-10-02
AI Q&A
2026-10-02
EPSS Evaluated
N/A
NVD
CVE-2026-96567
EUVD
EUVD-2026-91239

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mw_wp_form mw_wp_form to 5.1.7 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

The MW WP Form plugin for WordPress has a stored Cross-Site Scripting (XSS) vulnerability due to insufficient input sanitization and output escaping in the 'post_id' parameter. This allows unauthenticated attackers to inject malicious scripts into pages. The vulnerability is exploitable because the CSRF protection can be bypassed by loading a public form page to obtain a valid cookie.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using the MW WP Form plugin versions up to 5.1.7. Check for suspicious scripts in form submissions or pages. Use WordPress admin to review plugin versions and recent form submissions for unexpected content.

Impact Analysis

This vulnerability allows attackers to inject malicious scripts into your WordPress site. When users access the infected pages, the scripts can execute, potentially stealing sensitive data, session cookies, or performing actions on behalf of users. It compromises the security of both the site and its visitors.

Compliance Impact

This vulnerability can lead to data breaches, which may violate GDPR and HIPAA compliance. GDPR requires protecting user data, and a breach could result in fines. HIPAA mandates safeguarding protected health information, and this vulnerability could expose such data, leading to legal and financial penalties.

Mitigation Strategies

Immediately update the MW WP Form plugin to the latest version. If an update is unavailable, disable the plugin temporarily. Review all forms for injected scripts and remove any malicious payloads. Implement additional security measures like input validation and output escaping.

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