No VulnCrest analysis published for this CVE yet. Below is the original CNA/NVD description, unmodified.
Description
The User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 4.3.13 via the `post_content` parameter of the `submit_post()` function. The vulnerability exists because the protected-shortcode blocklist guard inspects the `sanitize_textarea_field()` copy of the submitted `post_content`, while the copy actually persisted to the database is processed through `wp_kses()`, whose `wp_kses_no_null()` step strips C0 control bytes — allowing an attacker to inject a single `\x01` byte inside the `[wpuf-registration]` tag name to defeat the `strpos()` blocklist check while the clean, functional shortcode is stored verbatim; `strip_shortcodes()` does not neutralize the stored shortcode either, because the Frontend container that registers it via `add_shortcode()` is only instantiated when `is_admin()` is false, and `admin-ajax` requests have `is_admin() === true`. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject a `[wpuf-registration role="editor"]` shortcode into a published post, causing a live Editor-role registration form to be rendered publicly on the frontend that any visitor — or the attacker themselves — can submit to mint a WordPress Editor account with an immediately active privileged session when the default `autologin_after_registration` setting is enabled.
Exploits & detection
No public PoC or detection template found yet.
In the news
- Wordfence Intelligence Weekly WordPress Vulnerability Report (October 26, 2026 to November 1, 2026)Wordfence · 05 Nov 2026
Timeline
- Published: 31 Oct 2026
- Last modified upstream: 06 Nov 2026
Sources & licenses
- Vulnerability data
- Wordfence Intelligence — record ↗ · Copyright Defiant Inc.
- CVE / CVSS / CWE
- NVD record ↗ (unmodified). This product uses the NVD API but is not endorsed or certified by the NVD. CVE® © The MITRE Corporation.
- Exploitation
- CISA KEV (CC0) · EPSS by FIRST.org
- References used for the analysis
- wordfence User Frontend <= 4.3.13 - Authenticated (Subscriber+) Privilege Escalation via post_content Parameter
- https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/includes/Ajax/Frontend_Form_Ajax.php#L132
- https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/includes/Ajax/Frontend_Form_Ajax.php#L253
- https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/includes/Frontend/Registration.php#L116
- https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/includes/Frontend/Registration.php#L362
- https://plugins.trac.wordpress.org/changeset/3770255/wp-user-frontend/trunk/includes/Ajax/Frontend_Form_Ajax.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/f84b6767-f254-45c9-8e78-36d4beac2a98?source=cve
- Analysis, summary and remediation
- © VulnCrest