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CVE-2021-23329

Status: ModifiedHigh (7.5)—

The package nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Getadigital — Nested-object-assign

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-23329",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "report@snyk.io",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
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          "attackVector": "NETWORK",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
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          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
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  },
  "affected": [
    {
      "source": "report@snyk.io",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "nested-object-assign",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "1.0.4",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-01-31T16:15:12.377",
  "references": [
    {
      "url": "https://github.com/Geta/NestedObjectAssign/pull/11",
      "tags": [
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        "Patch",
        "Third Party Advisory"
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      "source": "report@snyk.io"
    },
    {
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      "tags": [
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        "Third Party Advisory"
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      "source": "report@snyk.io"
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        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://snyk.io/vuln/SNYK-JS-NESTEDOBJECTASSIGN-1065977",
      "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 nested-object-assign before 1.0.4 are vulnerable to Prototype Pollution via the default function, as demonstrated by running the PoC below."
    },
    {
      "lang": "es",
      "value": "El paquete nested-object-assign versiones anteriores a 1.0.4, es vulnerable a una Contaminación de Prototipo mediante la función predeterminada, como es demostrado al ejecutar la PoC a continuación"
    }
  ],
  "lastModified": "2026-06-17T03:38:34.053",
  "configurations": [
    {
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        {
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          "cpeMatch": [
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              "versionEndExcluding": "1.0.4"
            }
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          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "report@snyk.io"
}