CVE-2026-96574
Received Received - Intake

Stored XSS in User Frontend WordPress Plugin

Publication date: 2026-10-10

Last updated on: 2026-10-10

Assigner: Wordfence

Description
The User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'wpuf_payment_method' parameter in all versions up to, and including, 4.3.12 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The bypass technique involves appending a valid gateway keyword such as 'bank' to the HTML payload, causing sanitize_text_field() to yield only the keyword for routing purposes while the full malicious raw value is stored and later rendered unescaped.

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Meta Information

Published
2026-10-10
Last Modified
2026-10-10
Generated
2026-10-10
AI Q&A
2026-10-10
EPSS Evaluated
N/A
NVD
CVE-2026-96574
EUVD
EUVD-2026-96225

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wedevs User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission 0

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

This WordPress plugin vulnerability allows authenticated attackers with subscriber-level access or higher to inject malicious scripts into web pages via the 'wpuf_payment_method' parameter. The flaw exists due to insufficient input sanitization and output escaping, enabling stored Cross-Site Scripting (XSS). Attackers can bypass security by appending a valid gateway keyword like 'bank' to their payload, which sanitize_text_field() processes incorrectly, storing the full malicious value for later unescaped execution.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using the User Frontend plugin up to version 4.3.12. Check for malicious scripts in pages where the 'wpuf_payment_method' parameter is used. Look for unusual HTML payloads or unsanitized input in stored data.

Impact Analysis

If you use this WordPress plugin, attackers could steal user sessions, deface your website, or redirect visitors to malicious sites. The stored XSS means the attack persists even after the initial injection, affecting all users who access the compromised page. Since it requires only subscriber-level access, the barrier to exploitation is low.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality requirements or HIPAA's safeguards for protected health information. If user data is compromised, organizations may face regulatory fines, legal liabilities, and reputational damage due to non-compliance with security standards.

Mitigation Strategies

Immediately update the User Frontend plugin to the latest version beyond 4.3.12. If an update is unavailable, disable the plugin temporarily. Review stored data for injected scripts and remove any malicious payloads. Restrict subscriber-level access to sensitive functions.

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