Vulnerability-Lookup

CVE-2025-8943 (GCVE-0-2025-8943)

Vulnerability from cvelistv5 – Published: 2025-08-14 09:54 – Updated: 2025-08-18 16:47

Title

Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers

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.

Severity ?

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-306 - Missing Authentication for Critical Function
CWE-862 - Missing Authorization

Assigner

JFROG

References

URL

Tags

https://research.jfrog.com/vulnerabilities/flowis…

third-party-advisory

Impacted products

	Vendor	Product	Version
			Affected: 0 , < 3.0.1 (semver)

Show details on NVD website

JSON

To clipboard

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                  {
                    "Automatable": "yes"
                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-14T13:36:14.464567Z",
                "version": "2.0.3"
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    ],
    "cna": {
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          "collectionURL": "https://www.npmjs.com",
          "packageName": "flowise",
          "versions": [
            {
              "lessThan": "3.0.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
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    "dateReserved": "2025-08-13T13:30:26.091Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
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}

FKIE_CVE-2025-8943

Vulnerability from fkie_nvd - Published: 2025-08-14 10:15 - Updated: 2025-09-23 15:23

Severity ?

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	reefs@jfrog.com	https://research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578/	Exploit, Third Party Advisory

Impacted products

	Vendor	Product	Version
	flowiseai	flowise	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "67090261-4C17-4E9D-98D7-4A321FA32C24",
              "versionEndExcluding": "3.0.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "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."
    }
  ],
  "id": "CVE-2025-8943",
  "lastModified": "2025-09-23T15:23:05.797",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "reefs@jfrog.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-08-14T10:15:29.637",
  "references": [
    {
      "source": "reefs@jfrog.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578/"
    }
  ],
  "sourceIdentifier": "reefs@jfrog.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        },
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

GHSA-2VV2-3X8X-4GV7

Vulnerability from github – Published: 2025-08-14 12:30 – Updated: 2025-08-18 21:07

Summary

Flowise OS command remote code execution

Details

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.

Severity ?

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "flowise"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "3.0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-8943"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306",
      "CWE-78"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-08-14T17:27:25Z",
    "nvd_published_at": "2025-08-14T10:15:29Z",
    "severity": "CRITICAL"
  },
  "details": "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.",
  "id": "GHSA-2vv2-3x8x-4gv7",
  "modified": "2025-08-18T21:07:48Z",
  "published": "2025-08-14T12:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-8943"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/FlowiseAI/Flowise"
    },
    {
      "type": "WEB",
      "url": "https://research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Flowise OS command remote code execution"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2025-8943 (GCVE-0-2025-8943)

FKIE_CVE-2025-8943

GHSA-2VV2-3X8X-4GV7

Tags

Sightings

Nomenclature