CVE-2025-55300

Estado: AplazadaAlta (8.6)—

Komari is a lightweight, self-hosted server monitoring tool designed to provide a simple and efficient solution for monitoring server performance. Prior to 1.0.4-fix1, WebSocket upgrader has disabled origin checking, enabling Cross-Site WebSocket Hijacking (CSWSH) attacks against authenticated users. Any third party website can send requests to the terminal websocket endpoint with browser's cookies, resulting in remote code execution. This vulnerability is fixed in 1.0.4-fix1.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 8.6

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.

ExplotaciónT1189 Drive-by Compromiseinitial access85 %
Impacto principalT1059 Command and Scripting Interpreterexecution90 %

XSS/CSWSH aprovecha navegador del usuario autenticado (UI:A) para ejecutar código remoto en el terminal WebSocket. CWE-79 y descripción confirman ataque web sin validación de origen.

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

Restrict Web-Based Content User Training Privileged Account Management Limit Software Installation Execution Prevention Behavior Prevention on Endpoint

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Komari — Komari^AI

CWE

CWE-79

Referencias

JSON original (NVD)

Mostrar

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      "value": "Komari is a lightweight, self-hosted server monitoring tool designed to provide a simple and efficient solution for monitoring server performance. Prior to 1.0.4-fix1, WebSocket upgrader has disabled origin checking, enabling Cross-Site WebSocket Hijacking (CSWSH) attacks against authenticated users. Any third party website can send requests to the terminal websocket endpoint with browser's cookies, resulting in remote code execution. This vulnerability is fixed in 1.0.4-fix1."
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      "lang": "es",
      "value": "Komari es una herramienta ligera y autoalojada para la monitorización de servidores, diseñada para ofrecer una solución sencilla y eficiente para supervisar el rendimiento del servidor. Antes de la versión 1.0.4-fix1, el actualizador de WebSocket deshabilitaba la comprobación de origen, lo que permitía ataques de Cross-Site WebSocket Hijacking (CSWSH) contra usuarios autenticados. Cualquier sitio web de terceros puede enviar solicitudes al endpoint websocket del terminal con las cookies del navegador, lo que provoca la ejecución remota de código. Esta vulnerabilidad se corrigió en la versión 1.0.4-fix1."
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  "lastModified": "2026-06-17T09:41:36.737",
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