CVE-2021-25948

Estado: ModificadaCrítica (9.8)—

Gravedad9.8Crítica · CVSS 3.1

Probabilidad de explotación3.30 %mayor que el 88 % de las CVE

Explotación activaNono figura en el catálogo de CISA

Exploit públicoNo conocidosin código público localizado

La vulnerabilidad de contaminación de prototipos en las versiones 0.1.0 a 1.0.1 de 'expand-hash' permite a un atacante provocar una denegación de servicio y puede llevar a la ejecución remota de código

CVSS

Puntuación base: 9.8
Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 3.30 %
Percentil entre todas las CVEs puntuadas: 88
Fecha de la puntuación: 23/10/2026

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)

Expand-hash Project — Expand-hash

CWE

CWE-1321

Referencias

Mostrar las 4 referencias

JSON original (NVD)

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{
  "id": "CVE-2021-25948",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "vulnerabilitylab@mend.io",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "expand-hash",
          "versions": [
            {
              "status": "affected",
              "version": "0.1.0, 0.1.1, 0.2.1, 0.2.2, 1.0.0, 1.0.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-06-10T12:15:08.607",
  "references": [
    {
      "url": "https://github.com/doowb/expand-hash/blob/556913f6c2f05848110b5b8261cfc78e5ce3dc77/index.js#L19",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "vulnerabilitylab@mend.io"
    },
    {
      "url": "https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25948",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "vulnerabilitylab@mend.io"
    },
    {
      "url": "https://github.com/doowb/expand-hash/blob/556913f6c2f05848110b5b8261cfc78e5ce3dc77/index.js#L19",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25948",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1321"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Prototype pollution vulnerability in 'expand-hash' versions 0.1.0 through 1.0.1 allows an attacker to cause a denial of service and may lead to remote code execution."
    },
    {
      "lang": "es",
      "value": "La vulnerabilidad de contaminación de prototipos en las versiones 0.1.0 a 1.0.1 de 'expand-hash' permite a un atacante provocar una denegación de servicio y puede llevar a la ejecución remota de código"
    }
  ],
  "lastModified": "2026-06-17T03:42:39.637",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:expand-hash_project:expand-hash:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C415A71D-B984-4AFE-8BE5-23C8C4FE764E",
              "versionEndIncluding": "1.0.1",
              "versionStartIncluding": "0.1.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "vulnerabilitylab@mend.io"
}