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CVE-2025-46559

Estado: AnalizadaAlta (7.5)—

Misskey is an open source, federated social media platform. Starting in version 12.31.0 and prior to version 2025.4.1, missing validation in `Mk:api` allows malicious AiScript code to access additional endpoints that it isn't designed to have access to. The missing validation allows malicious AiScript code to prefix a URL with `../` to step out of the `/api` directory, thereby being able to make requests to other endpoints, such as `/files`, `/url`, and `/proxy`. Version 2025.4.1 fixes the issue.

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 en validación de rutas (CWE-22) en API expuesta públicamente (AV:N, PR:N) permitiendo lectura de datos mediante traversal de directorios en `/files`, `/url`, `/proxy`.

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 ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkFilter Network TrafficApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Misskey — Misskey

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-46559",
  "cveTags": [],
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          "role": "CISA Coordinator",
          "options": [
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      "value": "Misskey is an open source, federated social media platform. Starting in version 12.31.0 and prior to version 2025.4.1, missing validation in `Mk:api` allows malicious AiScript code to access additional endpoints that it isn't designed to have access to. The missing validation allows malicious AiScript code to prefix a URL with `../` to step out of the `/api` directory, thereby being able to make requests to other endpoints, such as `/files`, `/url`, and `/proxy`. Version 2025.4.1 fixes the issue."
    },
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      "lang": "es",
      "value": "Misskey es una plataforma de redes sociales federada de código abierto. A partir de la versión 12.31.0 y anteriores a la 2025.4.1, la falta de validación en `Mk:api` permite que código AiScript malicioso acceda a endpoints adicionales a los que no está diseñado. Esta falta de validación permite que el código AiScript malicioso anteponga `../` a una URL para salir del directorio `/api`, lo que permite realizar solicitudes a otros endpoints, como `/files`, `/url` y `/proxy`. La versión 2025.4.1 soluciona el problema."
    }
  ],
  "lastModified": "2026-06-17T09:26:37.723",
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