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CVE-2025-59340

Estado: AnalizadaCrítica (10)—

jinjava is a Java-based template engine based on django template syntax, adapted to render jinja templates. Priori to 2.8.1, by using mapper.getTypeFactory().constructFromCanonical(), it is possible to instruct the underlying ObjectMapper to deserialize attacker-controlled input into arbitrary classes. This enables the creation of semi-arbitrary class instances without directly invoking restricted methods or class literals. As a result, an attacker can escape the sandbox and instantiate classes such as java.net.URL, opening up the ability to access local files and URLs(e.g., file:///etc/passwd). With further chaining, this primitive can potentially lead to remote code execution (RCE). This vulnerability is fixed in 2.8.1.

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.

Vector CVSS AV:N/PR:N indica vulnerabilidad remota sin autenticación. Jinjava expone el motor de plantillas a entrada de red. La deserialización sin restricciones permite acceso a ficheros locales (T1005) y RCE potencial (T1059), con escalada mediante instanciación de clases (T1068).

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)

Hubspot — Jinjava

CWE

Referencias

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          "version": "2.0.3",
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      "lang": "en",
      "value": "jinjava is a Java-based template engine based on django template syntax, adapted to render jinja templates. Priori to 2.8.1, by using mapper.getTypeFactory().constructFromCanonical(), it is possible to instruct the underlying ObjectMapper to deserialize attacker-controlled input into arbitrary classes. This enables the creation of semi-arbitrary class instances without directly invoking restricted methods or class literals. As a result, an attacker can escape the sandbox and instantiate classes such as java.net.URL, opening up the ability to access local files and URLs(e.g., file:///etc/passwd). With further chaining, this primitive can potentially lead to remote code execution (RCE). This vulnerability is fixed in 2.8.1."
    },
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      "lang": "es",
      "value": "jinjava es un motor de plantillas basado en Java, basado en la sintaxis de plantillas de Django, adaptado para renderizar plantillas Jinja. Anterior a 2.8.1, al usar mapper.getTypeFactory().constructFromCanonical(), es posible instruir al ObjectMapper subyacente para deserializar la entrada controlada por el atacante en clases arbitrarias. Esto permite la creación de instancias de clases semi-arbitrarias sin invocar directamente métodos restringidos o literales de clase. Como resultado, un atacante puede escapar de la sandbox e instanciar clases como java.net.URL, abriendo la capacidad de acceder a archivos locales y URLs (por ejemplo, file:///etc/p4sswd). Con un encadenamiento adicional, esta primitiva puede potencialmente conducir a la ejecución remota de código (RCE). Esta vulnerabilidad está corregida en 2.8.1."
    }
  ],
  "lastModified": "2026-06-17T09:45:56.163",
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