CVE-2026-19769
Vulnérabilité élevée dans Ninja Forms – The Contact Form Builder That Grows With You (kstover)
Description
The Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Repeater Child 'type' Confusion via Unmatched Array Key in all versions up to, and including, 3.15.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the Ninja Forms File Uploads add-on to be active, as the attack routes the unwhitelisted child entry through the File Uploads handler to write an attacker-supplied HTML file containing arbitrary JavaScript into any web-server-writable directory, including the site root, where it is served from the site's own origin.
Gravité et risque d'exploitation
CVE-2026-19769 obtient un score CVSS de 7.2/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.25 %, ce qui la place devant 14.8 % des CVE référencées.
Que faire ?
- Vérifiez si Ninja Forms – The Contact Form Builder That Grows With You (versions <=3.15.1, 0) 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/2330e381-7db3-4b79-8827-818d2ea954b5?source=cve
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L609
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L303
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L55
- https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L61
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3674413%40ninja-forms%2Ftags%2F3.15.2&old=3663678%40ninja-forms%2Ftags%2F3.15.1
- https://plugins.trac.wordpress.org/changeset/3674413/ninja-forms/trunk/includes/AJAX/Controllers/Submission.php
- https://plugins.trac.wordpress.org/changeset?old_path=%2Fninja-forms/tags/3.15.1&new_path=%2Fninja-forms/tags/3.15.2
