CVE-2025-67288

Estado: ModificadaCrítica (10)—

An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code by uploading a crafted PDF file. NOTE: this is disputed by the Supplier because the responsibility for file validation (as shown in the documentation) belongs to the system administrator who is implementing Umbraco CMS in their environment, not to Umbraco CMS itself. The Supplier also states that PDF JavaScript runs in a completely isolated sandbox, not the browser's DOM context, which means that privilege boundaries would not be crossed, a related issue to CVE-2023-49279.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Puntuación base: 10

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.55%
Percentil entre todas las CVEs puntuadas: 44
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access90 %
Impacto principalT1505.003 Web Shellpersistence85 %
Impacto secundarioT1059 Command and Scripting Interpreterexecution75 %

CWE-434 (arbitrary file upload) en aplicación web expuesta (AV:N, PR:N, UI:N) permite subir PDF malicioso; acceso remoto sin privilegios dicta T1190. Impactos: web shell (T1505.003) por ejecución en servidor; código arbitrario en PDF (T1059) aunque con limitaciones de sandbox según el proveedor.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account Management Disable or Remove Feature or Program Vulnerability Scanning User Account Management Restrict Web-Based Content Network Segmentation

Tecnologías afectadas (1)

Umbraco — Umbraco CMS

CWE

CWE-434

Referencias

https://github.com/vuquyen03/CVE/tree/main/CVE-2025-67288

JSON original (NVD)

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