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CVE-2025-21611

Estado: AnalizadaAlta (8.8)—

tgstation-server is a production scale tool for BYOND server management. Prior to 6.12.3, roles used to authorize API methods were incorrectly OR'd instead of AND'ed with the role used to determine if a user was enabled. This allows enabled users access to most, but not all, authorized actions regardless of their permissions. Notably, the WriteUsers right is unaffected so users may not use this bug to permanently elevate their account permissions. The fix is release in tgstation-server-v6.12.3.

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.

AV:N/AC:L/PR:L permite acceso remoto con privilegios bajos (T1210). Lógica OR incorrecta en roles permite a usuarios autenticados eludir controles de autorización, obteniendo acceso no autorizado (T1078.001) y potencialmente ejecutar acciones API sin permisos (T1059).

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 ScanningThreat Intelligence ProgramPrivileged Account ManagementNetwork SegmentationDisable or Remove Feature or ProgramApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Tgstation13 — Tgstation-server

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-21611",
  "cveTags": [],
  "metrics": {
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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
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              "automatable": "no"
            },
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              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-01-06T16:49:39.073394Z"
        }
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      "description": [
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      "value": "tgstation-server is a production scale tool for BYOND server management. Prior to 6.12.3, roles used to authorize API methods were incorrectly OR'd instead of AND'ed with the role used to determine if a user was enabled. This allows enabled users access to most, but not all, authorized actions regardless of their permissions. Notably, the WriteUsers right is unaffected so users may not use this bug to permanently elevate their account permissions. The fix is release in tgstation-server-v6.12.3."
    },
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      "value": "tgstation-server es una herramienta de escala de producción para la administración de servidores BYOND. Antes de la versión 6.12.3, los roles utilizados para autorizar métodos de API se combinaban incorrectamente con OR en lugar de AND con el rol utilizado para determinar si un usuario estaba habilitado. Esto permite a los usuarios habilitados acceder a la mayoría de las acciones autorizadas, pero no a todas, independientemente de sus permisos. En particular, el derecho WriteUsers no se ve afectado, por lo que los usuarios no pueden usar este error para elevar permanentemente los permisos de su cuenta. La solución se publica en tgstation-server-v6.12.3."
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  ],
  "lastModified": "2026-06-17T08:43:51.083",
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          "operator": "OR"
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