CVE-2026-96574: User Frontend <= 4.3.12 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'wpuf_payment_method' Parameter
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 'wpufpaymentmethod' 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 sanitizetextfield() to yield only the keyword for routing purposes while the full malicious raw value is stored and later rendered unescaped.
Affected Software
Event History
Frequently Asked Questions
Which users could exploit this issue?
An attacker needs an authenticated WordPress account with Subscriber-level privileges or higher. No user interaction is required from the attacker after submitting the malicious value.
What conditions make an installation vulnerable?
The affected plugin is vulnerable in versions up to and including 4.3.12. Exploitation uses the wpuf_payment_method parameter and relies on a valid payment gateway keyword, such as bank, being appended to the malicious HTML payload.
What is the likely impact if exploitation succeeds?
The attacker can store arbitrary web script content that executes when another user visits a page where the injected value is rendered. The provided severity vector indicates low confidentiality and integrity impact, with no availability impact.