CVE-2026-6228
Vulnérabilité élevée dans Frontend Admin by DynamiApps (shabti)
Description
The Frontend Admin by DynamiApps plugin for WordPress is vulnerable to Privilege Escalation in versions up to and including 3.28.36. This is due to insufficient authorization checks in the role field update mechanism combined with overly permissive capabilities for the admin_form post type. The admin_form custom post type uses 'capability_type' => 'page', which grants editors the ability to create and edit forms. When an editor creates an edit_user form, they can manipulate the form configuration to include 'administrator' in the role_options array by directly submitting POST data to wp-admin/post.php, bypassing the UI restrictions in feadmin_get_user_roles(). When the form is subsequently submitted, the pre_update_value() function in class-role.php only validates that the submitted role exists in the form's role_options array (lines 107-110), but fails to verify that the current user has permission to assign that specific role. This makes it possible for unauthenticated attackers to first register as editors (via a public new_user form), then create an edit_user form with administrator in the allowed roles, and finally use that form to escalate their own privileges to administrator.
Gravité et risque d'exploitation
CVE-2026-6228 obtient un score CVSS de 8.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.77 %, ce qui la place devant 55.0 % des CVE référencées.
Que faire ?
- Vérifiez si Frontend Admin by DynamiApps (versions 0, <=3.28.36) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.
Références
- https://www.wordfence.com/threat-intel/vulnerabilities/id/083accd0-8338-47c6-b396-96679b95dd40?source=cve
- https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/trunk/main/frontend/fields/user/class-role.php#L113
- https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/trunk/main/admin/admin-pages/forms/post-types.php#L53
- https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/trunk/main/frontend/forms/actions/user.php#L517
- https://plugins.trac.wordpress.org/changeset/3519460