Vulnerabilidad · Publicado 29/08/2026
El plugin Sigma Forms Pro para WordPress (versiones hasta 1.4.5) es vulnerable a ejecución remota de código (RCE) mediante la función handle_form_submission. La vulnerabilidad permite a atacantes no autenticados subir archivos maliciosos al explotar la asignación dinámica de capacidades unfiltered_upload y el bypass de validación de tipos MIME. Afecta directamente a sitios WordPress en LATAM que utilizan este plugin para gestión de formularios sin parches.
The Sigma Forms Pro plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.4.5 via the handle_form_submission function. This is due to the plugin dynamically granting the unfiltered_upload capability to all users during form submissions and bypassing MIME type validation when allowed_file_types is not configured. This makes it possible for unauthenticated attackers to execute code on the server. Several default pre-built templates including Job Application, Support Ticket, and Wholesale Application have file upload fields with no file type restrictions configured by design, making this vulnerability immediately exploitable upon installation.
Score: 9.8/10 — Severidad: CRITICAL — Estado NIST: Received
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-434
Publicado en NIST NVD.