CVE-2026-84960
Received Received - Intake

Reflected Cross-Site Scripting in WP-Members Membership Plugin

Publication date: 2026-09-11

Last updated on: 2026-09-11

Assigner: Wordfence

Description
The WP-Members Membership Plugin plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via URL Query String in all versions up to, and including, 3.5.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Successful exploitation requires the victim to first visit the attacker-crafted URL and then click the Terms of Service link rendered on the resulting registration page.

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Meta Information

Published
2026-09-11
Last Modified
2026-09-11
Generated
2026-09-11
AI Q&A
2026-09-11
EPSS Evaluated
N/A
NVD
CVE-2026-84960
EUVD
EUVD-2026-75933

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wp-members membership_plugin to 3.5.6 (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 WP-Members Membership Plugin for WordPress has a reflected Cross-Site Scripting (XSS) vulnerability due to insufficient input sanitization and output escaping in versions up to 3.5.6. Attackers can inject malicious scripts via URL query strings, which execute when a user clicks a link and visits the registration page.

Detection Guidance

This vulnerability is specific to WordPress sites using the WP-Members Membership Plugin up to version 3.5.6. Detection involves checking plugin versions and monitoring for suspicious URL interactions. No direct network commands detect this, but inspecting web server logs for unusual query strings or user-agent patterns may help.

Impact Analysis

Unauthenticated attackers could trick users into clicking a malicious link, leading to arbitrary script execution in their browser. This may result in session hijacking, data theft, or defacement of affected pages.

Compliance Impact

This vulnerability could expose user data to attackers, potentially violating GDPR (data protection) and HIPAA (health data privacy) by enabling unauthorized access or disclosure of sensitive information.

Mitigation Strategies

Immediately update the WP-Members Membership Plugin to the latest version beyond 3.5.6. If updating is not possible, disable the plugin temporarily until a patch is applied. Review user input validation and output escaping in the plugin's code as a secondary measure.

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