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CVE-2021-23558

Estado: ModificadaCrítica (9.8)—

The package bmoor before 0.10.1 are vulnerable to Prototype Pollution due to missing sanitization in set function. **Note:** This vulnerability derives from an incomplete fix in [CVE-2020-7736](https://security.snyk.io/vuln/SNYK-JS-BMOOR-598664)

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)

Bmoor Project — Bmoor

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-23558",
  "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": "Secondary",
        "source": "report@snyk.io",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.3,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.4,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
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          "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
      }
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  "affected": [
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      "affectedData": [
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          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "version": "n/a"
            }
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  ],
  "published": "2022-01-28T22:15:09.073",
  "references": [
    {
      "url": "https://github.com/b-heilman/bmoor/commit/29b0162cc1dc1791fc060891f568b0ae29bc542b",
      "tags": [
        "Patch",
        "Third Party Advisory"
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    },
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      "url": "https://snyk.io/blog/remediate-javascript-type-confusion-bypassed-input-validation/",
      "tags": [
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      "source": "report@snyk.io"
    },
    {
      "url": "https://snyk.io/vuln/SNYK-JS-BMOOR-2342622",
      "tags": [
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        "Third Party Advisory"
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      "source": "report@snyk.io"
    },
    {
      "url": "https://github.com/b-heilman/bmoor/commit/29b0162cc1dc1791fc060891f568b0ae29bc542b",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://snyk.io/blog/remediate-javascript-type-confusion-bypassed-input-validation/",
      "tags": [
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://snyk.io/vuln/SNYK-JS-BMOOR-2342622",
      "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": "The package bmoor before 0.10.1 are vulnerable to Prototype Pollution due to missing sanitization in set function. **Note:** This vulnerability derives from an incomplete fix in [CVE-2020-7736](https://security.snyk.io/vuln/SNYK-JS-BMOOR-598664)"
    },
    {
      "lang": "es",
      "value": "El paquete bmoor versiones anteriores a 0.10.1, es vulnerable a una Contaminación de Prototipos debido a una falta de saneo en la función set. **Nota:** Esta vulnerabilidad es derivada de una corrección incompleta en [CVE-2020-7736](https://security.snyk.io/vuln/SNYK-JS-BMOOR-598664)"
    }
  ],
  "lastModified": "2026-06-17T03:38:49.463",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:bmoor_project:bmoor:*:*:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E0350D18-5232-4890-A30C-0D4E4946C6A7",
              "versionEndExcluding": "0.10.1"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "report@snyk.io"
}