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CVE-2026-25890

Estado: AnalizadaAlta (8.1)—

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to 2.57.1, an authenticated user can bypass the application's "Disallow" file path rules by modifying the request URL. By adding multiple slashes (e.g., //private/) to the path, the authorization check fails to match the rule, while the underlying filesystem resolves the path correctly, granting unauthorized access to restricted files. This vulnerability is fixed in 2.57.1.

CVSS

Probabilidad de explotación (EPSS)

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.

Acceso remoto autenticado (AV:N, PR:L) a servicio restringido explotando bypass de validación en rutas. Impacto: lectura no autorizada de archivos privados mediante evasión de controles de acceso.

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

Vulnerability ScanningThreat Intelligence ProgramPrivileged Account ManagementPassword PoliciesNetwork SegmentationMulti-factor Authentication

Tecnologías afectadas (1)

Filebrowser — Filebrowser

CWE

Referencias

JSON original (NVD)

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          "options": [
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      "value": "File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to 2.57.1, an authenticated user can bypass the application's \"Disallow\" file path rules by modifying the request URL. By adding multiple slashes (e.g., //private/) to the path, the authorization check fails to match the rule, while the underlying filesystem resolves the path correctly, granting unauthorized access to restricted files. This vulnerability is fixed in 2.57.1."
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      "value": "Navegador de Archivos proporciona una interfaz de gestión de archivos dentro de un directorio especificado y se puede utilizar para subir, eliminar, previsualizar, renombrar y editar archivos. Antes de la versión 2.57.1, un usuario autenticado puede eludir las reglas de ruta de archivo 'Disallow' de la aplicación modificando la URL de la solicitud. Al añadir múltiples barras (por ejemplo, //private/) a la ruta, la comprobación de autorización no logra coincidir con la regla, mientras que el sistema de archivos subyacente resuelve la ruta correctamente, otorgando acceso no autorizado a archivos restringidos. Esta vulnerabilidad está corregida en la versión 2.57.1."
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  "lastModified": "2026-06-17T10:25:23.263",
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