CVE-2025-8943 (GCVE-0-2025-8943)
Vulnerability from cvelistv5
Published
2025-08-14 09:54
Modified
2025-08-14 09:54
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
The Custom MCPs feature is designed to execute OS commands, for instance, using tools like `npx` to spin up local MCP Servers. However, Flowise's inherent authentication and authorization model is minimal and lacks role-based access controls (RBAC). Furthermore, in Flowise versions before 3.0.1 the default installation operates without authentication unless explicitly configured. This combination allows unauthenticated network attackers to execute unsandboxed OS commands.
References
Impacted products
Vendor Product Version
Version: 0   ≤
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://www.npmjs.com",
          "packageName": "flowise",
          "versions": [
            {
              "lessThan": "3.0.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
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              "type": "text/html",
              "value": "\u003cp\u003eThe Custom MCPs feature is designed to execute OS commands, for instance, using tools like `npx` to spin up local MCP Servers. However, Flowise\u0027s inherent authentication and authorization model is minimal and lacks role-based access controls (RBAC). Furthermore, in Flowise versions before 3.0.1 the default installation operates without authentication unless explicitly configured. This combination allows unauthenticated network attackers to execute unsandboxed OS commands. \u003c/p\u003e"
            }
          ],
          "value": "The Custom MCPs feature is designed to execute OS commands, for instance, using tools like `npx` to spin up local MCP Servers. However, Flowise\u0027s inherent authentication and authorization model is minimal and lacks role-based access controls (RBAC). Furthermore, in Flowise versions before 3.0.1 the default installation operates without authentication unless explicitly configured. This combination allows unauthenticated network attackers to execute unsandboxed OS commands."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-14T09:54:22.531Z",
        "orgId": "48a46f29-ae42-4e1d-90dd-c1676c1e5e6d",
        "shortName": "JFROG"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578/"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "48a46f29-ae42-4e1d-90dd-c1676c1e5e6d",
    "assignerShortName": "JFROG",
    "cveId": "CVE-2025-8943",
    "datePublished": "2025-08-14T09:54:22.531Z",
    "dateReserved": "2025-08-13T13:30:26.091Z",
    "dateUpdated": "2025-08-14T09:54:22.531Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-8943\",\"sourceIdentifier\":\"reefs@jfrog.com\",\"published\":\"2025-08-14T10:15:29.637\",\"lastModified\":\"2025-08-14T13:11:53.633\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The Custom MCPs feature is designed to execute OS commands, for instance, using tools like `npx` to spin up local MCP Servers. However, Flowise\u0027s inherent authentication and authorization model is minimal and lacks role-based access controls (RBAC). Furthermore, in Flowise versions before 3.0.1 the default installation operates without authentication unless explicitly configured. This combination allows unauthenticated network attackers to execute unsandboxed OS commands.\"},{\"lang\":\"es\",\"value\":\"La funci\u00f3n MCP personalizados est\u00e1 dise\u00f1ada para ejecutar comandos del sistema operativo, por ejemplo, mediante herramientas como `npx` para activar servidores MCP locales. Sin embargo, el modelo de autenticaci\u00f3n y autorizaci\u00f3n inherente de Flowise es m\u00ednimo y carece de controles de acceso basados en roles (RBAC). Adem\u00e1s, en versiones de Flowise anteriores a la 3.0.1, la instalaci\u00f3n predeterminada funciona sin autenticaci\u00f3n a menos que se configure expl\u00edcitamente. Esta combinaci\u00f3n permite a atacantes de red no autenticados ejecutar comandos del sistema operativo sin protecci\u00f3n de seguridad.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"reefs@jfrog.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578/\",\"source\":\"reefs@jfrog.com\"}]}}"
  }
}


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