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CVE-2021-42258

Estado: AnalizadaCrítica (9.8)⚠ Explotación activa💥 Exploit

BQE BillQuick Web Suite 2018 through 2021 before 22.0.9.1 allows SQL injection for unauthenticated remote code execution, as exploited in the wild in October 2021 for ransomware installation. SQL injection can, for example, use the txtID (aka username) parameter. Successful exploitation can include the ability to execute arbitrary code as MSSQLSERVER$ via xp_cmdshell.

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).

CISA KEV — explotada activamente

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

SQL injection (CWE-89) en parámetro txtID sin autenticación (AV:N/PR:N) permite ejecución de comandos vía xp_cmdshell en MSSQLSERVER, explotado activamente para ransomware.

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 ScanningRestrict Web-Based ContentRestrict File and Directory PermissionsPrivileged Account ManagementRemote Data StorageNetwork Segmentation

Tecnologías afectadas (1)

BQE — Billquick WEB Suite

CWE

Referencias

JSON original (NVD)

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  "vulnStatus": "Analyzed",
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      "value": "BQE BillQuick Web Suite 2018 through 2021 before 22.0.9.1 allows SQL injection for unauthenticated remote code execution, as exploited in the wild in October 2021 for ransomware installation. SQL injection can, for example, use the txtID (aka username) parameter. Successful exploitation can include the ability to execute arbitrary code as MSSQLSERVER$ via xp_cmdshell."
    },
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      "value": "BQE BillQuick Web Suite versiones 2018 hasta 2021 anteriores a 22.0.9.1, permite una inyección SQL para una ejecución de código remota sin autenticación, como es explotada \"in the wild\" en octubre de 2021 para la instalación de ransomware. Una inyección SQL puede, por ejemplo, usar el parámetro txtID (también se conoce como nombre de usuario). Una explotación con éxito puede incluir la habilidad de ejecutar código arbitrario como MSSQLSERVER$ por medio de xp_cmdshell"
    }
  ],
  "lastModified": "2026-06-17T04:09:31.510",
  "cisaActionDue": "2021-11-17",
  "cisaExploitAdd": "2021-11-03",
  "configurations": [
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  "sourceIdentifier": "cve@mitre.org",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "BQE BillQuick Web Suite SQL Injection Vulnerability"
}