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CVE-2021-43307

Estado: ModificadaAlta (7.5)—

An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the semver-regex npm package, when an attacker is able to supply arbitrary input to the test() method

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)

Semver-regex Project — Semver-regex

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-43307",
  "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": "reefs@jfrog.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.9,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.2
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "reefs@jfrog.com",
      "affectedData": [
        {
          "vendor": "semver-regex",
          "product": "semver-regex",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "4.0.3",
                  "status": "unaffected"
                }
              ],
              "version": "unspecified",
              "lessThan": "3.1.4",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-06-02T14:15:30.987",
  "references": [
    {
      "url": "https://research.jfrog.com/vulnerabilities/semver-regex-redos-xray-211349/",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "reefs@jfrog.com"
    },
    {
      "url": "https://research.jfrog.com/vulnerabilities/semver-regex-redos-xray-211349/",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "reefs@jfrog.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1333"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1333"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the semver-regex npm package, when an attacker is able to supply arbitrary input to the test() method"
    },
    {
      "lang": "es",
      "value": "Una ReDoS exponencial (Denegación de Servicio por Expresión Regular) puede ser desencadenada en el paquete npm semver-regex, cuando un atacante es capaz de suministrar una entrada arbitraria al método test()"
    }
  ],
  "lastModified": "2026-06-17T04:10:49.600",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:semver-regex_project:semver-regex:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B530AB51-E31B-4C43-8F6B-2ABEBBE6FB21",
              "versionEndExcluding": "3.1.4"
            },
            {
              "criteria": "cpe:2.3:a:semver-regex_project:semver-regex:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "ECF2F895-5C11-48C9-9AE6-A0F79400674F",
              "versionEndExcluding": "4.0.3",
              "versionStartIncluding": "4.0.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "reefs@jfrog.com"
}