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CVE-2021-21297

Estado: ModificadaMedia (6.5)—

Node-Red is a low-code programming for event-driven applications built using nodejs. Node-RED 1.2.7 and earlier contains a Prototype Pollution vulnerability in the admin API. A badly formed request can modify the prototype of the default JavaScript Object with the potential to affect the default behaviour of the Node-RED runtime. The vulnerability is patched in the 1.2.8 release. A workaround is to ensure only authorized users are able to access the editor url.

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).

Tecnologías afectadas (1)

Nodered — Node-red

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-21297",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 7.7,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 3.1
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
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  "affected": [
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      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "node-red",
          "product": "node-red",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.2.8"
            }
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        }
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  "published": "2021-02-26T17:15:12.210",
  "references": [
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      "url": "https://github.com/node-red/node-red/releases/tag/1.2.8",
      "tags": [
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        "Third Party Advisory"
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    {
      "url": "https://www.npmjs.com/package/%40node-red/editor-api",
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      "url": "https://www.npmjs.com/package/%40node-red/runtime",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-915"
        },
        {
          "lang": "en",
          "value": "CWE-1321"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1321"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Node-Red is a low-code programming for event-driven applications built using nodejs. Node-RED 1.2.7 and earlier contains a Prototype Pollution vulnerability in the admin API. A badly formed request can modify the prototype of the default JavaScript Object with the potential to affect the default behaviour of the Node-RED runtime. The vulnerability is patched in the 1.2.8 release. A workaround is to ensure only authorized users are able to access the editor url."
    },
    {
      "lang": "es",
      "value": "Node-Red es una programación de low-code para aplicaciones basadas en eventos diseñadas usando nodejs.&#xa0;Node-RED versiones 1.2.7 y anteriores contienen, una vulnerabilidad de Contaminación de Prototipos en la API de administración.&#xa0;Una petición mal formada puede modificar el prototipo del Objeto JavaScript predeterminado con el potencial de afectar el comportamiento predeterminado del tiempo de ejecución de Node-RED.&#xa0;La vulnerabilidad está parcheada en versión 1.2.8.&#xa0;Una solución alternativa es asegurarse de que solo los usuarios autorizados puedan ser capaces de acceder a la URL de editor"
    }
  ],
  "lastModified": "2026-06-17T03:35:14.380",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nodered:node-red:*:*:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FD380E45-4954-4427-90D5-66896B983B30",
              "versionEndExcluding": "1.2.8"
            }
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  "sourceIdentifier": "security-advisories@github.com"
}