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CVE-2025-54802

Estado: AnalizadaCrítica (9.8)—

pyLoad is the free and open-source Download Manager written in pure Python. In versions 0.5.0b3.dev89 and below, there is an opportunity for path traversal in pyLoad-ng CNL Blueprint via package parameter, allowing Arbitrary File Write which leads to Remote Code Execution (RCE). The addcrypted endpoint in pyload-ng suffers from an unsafe path construction vulnerability, allowing unauthenticated attackers to write arbitrary files outside the designated storage directory. This can be abused to overwrite critical system files, including cron jobs and systemd services, leading to privilege escalation and remote code execution as root. This issue is fixed in version 0.5.0b3.dev90.

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.

Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N indica explotación remota sin autenticación (T1190). Path traversal permite escritura arbitraria de ficheros → RCE (T1059), escalada a root (T1068) y manipulación de cron/systemd (T1565.001).

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 ManagementExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareVulnerability Scanning

Tecnologías afectadas (1)

Pyload-ng Project — Pyload-ng

CWE

Referencias

JSON original (NVD)

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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
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            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
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          "version": "2.0.3",
          "timestamp": "2025-08-05T14:29:40.016514Z"
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          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
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      "lang": "en",
      "value": "pyLoad is the free and open-source Download Manager written in pure Python. In versions 0.5.0b3.dev89 and below, there is an opportunity for path traversal in pyLoad-ng CNL Blueprint via package parameter, allowing Arbitrary File Write which leads to Remote Code Execution (RCE). The addcrypted endpoint in pyload-ng suffers from an unsafe path construction vulnerability, allowing unauthenticated attackers to write arbitrary files outside the designated storage directory. This can be abused to overwrite critical system files, including cron jobs and systemd services, leading to privilege escalation and remote code execution as root. This issue is fixed in version 0.5.0b3.dev90."
    },
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      "lang": "es",
      "value": "pyLoad es un gestor de descargas gratuito y de código abierto escrito en Python puro. En las versiones 0.5.0b3.dev89 y anteriores, existe la posibilidad de path traversal en el CNL Blueprint de pyLoad-ng mediante el parámetro \"paquete\", lo que permite la escritura arbitraria de archivos y la ejecución remota de código (RCE). El endpoint addcrypted de pyload-ng presenta una vulnerabilidad de construcción de rutas inseguras, que permite a atacantes no autenticados escribir archivos arbitrarios fuera del directorio de almacenamiento designado. Esto puede utilizarse para sobrescribir archivos críticos del sistema, como tareas cron y servicios systemd, lo que provoca la escalada de privilegios y la ejecución remota de código como root. Este problema se solucionó en la versión 0.5.0b3.dev90."
    }
  ],
  "lastModified": "2026-06-17T09:40:43.900",
  "configurations": [
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