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CVE-2025-66480

Estado: AnalizadaCrítica (9.8)—

Wildfire IM is an instant messaging and real-time audio/video solution. Prior to 1.4.3, a critical vulnerability exists in the im-server component related to the file upload functionality found in com.xiaoleilu.loServer.action.UploadFileAction. The application exposes an endpoint (/fs) that handles multipart file uploads but fails to properly sanitize the filename provided by the user.

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Specifically, the writeFileUploadData method directly concatenates the configured storage directory with the filename extracted from the upload request without stripping directory traversal sequences (e.g., ../../). This vulnerability allows an attacker to write arbitrary files to any location on the server's filesystem where the application process has write permissions. By uploading malicious files (such as scripts, executables, or overwriting configuration files like authorized_keys or cron jobs), an attacker can achieve Remote Code Execution (RCE) and completely compromise the server. This vulnerability is fixed in 1.4.3.

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.

Vulnerabilidad de traversal de directorios en endpoint HTTP /fs sin validación de nombres de archivo. Permite escritura de archivos arbitrarios (webshell, scripts) y RCE. Vector CVSS N/N/N confirma explotación remota sin privilegios (T1190).

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 ManagementDisable or Remove Feature or ProgramVulnerability ScanningUser Account ManagementRestrict Web-Based ContentNetwork Segmentation

Tecnologías afectadas (1)

Wildfirechat — Im-server

CWE

Referencias

JSON original (NVD)

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      "value": "Wildfire IM is an instant messaging and real-time audio/video solution. Prior to 1.4.3, a critical vulnerability exists in the im-server component related to the file upload functionality found in com.xiaoleilu.loServer.action.UploadFileAction. The application exposes an endpoint (/fs) that handles multipart file uploads but fails to properly sanitize the filename provided by the user. Specifically, the writeFileUploadData method directly concatenates the configured storage directory with the filename extracted from the upload request without stripping directory traversal sequences (e.g., ../../). This vulnerability allows an attacker to write arbitrary files to any location on the server's filesystem where the application process has write permissions. By uploading malicious files (such as scripts, executables, or overwriting configuration files like authorized_keys or cron jobs), an attacker can achieve Remote Code Execution (RCE) and completely compromise the server. This vulnerability is fixed in 1.4.3."
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      "value": "Wildfire IM es una solución de mensajería instantánea y audio/video en tiempo real. Prior a la versión 1.4.3, existe una vulnerabilidad crítica en el componente im-server relacionada con la funcionalidad de carga de archivos encontrada en com.xiaoleilu.loServer.action.UploadFileAction. La aplicación expone un endpoint (/fs) que maneja cargas de archivos multipart pero no sanitiza correctamente el nombre de archivo proporcionado por el usuario. Específicamente, el método writeFileUploadData concatena directamente el directorio de almacenamiento configurado con el nombre de archivo extraído de la solicitud de carga sin eliminar las secuencias de salto de directorio (p. ej., ../../). Esta vulnerabilidad permite a un atacante escribir archivos arbitrarios en cualquier ubicación del sistema de archivos del servidor donde el proceso de la aplicación tenga permisos de escritura. Al cargar archivos maliciosos (como scripts, ejecutables o sobrescribiendo archivos de configuración como authorized_keys o tareas cron), un atacante puede lograr Ejecución Remota de Código (RCE) y comprometer completamente el servidor. Esta vulnerabilidad está corregida en la versión 1.4.3."
    }
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  "lastModified": "2026-06-17T09:56:54.390",
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