{"id":"CVE-2026-120070","title":"User Frontend <= 4.3.13 - Authenticated (Subscriber+) Privilege Escalation via post_content Parameter","summary":"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 v…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-269"],"vendor":"wedevs","product":"User Frontend – Membership, User Registration, User Profile, User Directory & Content Restriction with Frontend Post Submission","affected":["user_frontend_membership_user_registration_user_profile_user_directory_content_restriction_with_frontend_post_submission <= 4.3.13"],"published":"2026-10-31","updated":"2026-10-31","sourceUpdated":"2026-10-31T07:46:53.190Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-120070","references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/f84b6767-f254-45c9-8e78-36d4beac2a98?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/includes/Ajax/Frontend_Form_Ajax.php#L253"},{"url":"https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/includes/Ajax/Frontend_Form_Ajax.php#L132"},{"url":"https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/includes/Frontend/Registration.php#L116"},{"url":"https://plugins.trac.wordpress.org/browser/wp-user-frontend/tags/4.3.13/includes/Frontend/Registration.php#L362"},{"url":"https://plugins.trac.wordpress.org/changeset/3770255/wp-user-frontend/trunk/includes/Ajax/Frontend_Form_Ajax.php"}],"tags":["cve.org"],"epss":0.00302,"epssPercentile":0.23072,"ingestedAt":"2026-11-05T16:24:31.540Z","slug":"CVE-2026-120070","body":"## Overview\n\nThe 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.\n\n## Affected\n\n- `user_frontend_membership_user_registration_user_profile_user_directory_content_restriction_with_frontend_post_submission <= 4.3.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}