« Volver al listado

CVE-2021-43803

Estado: ModificadaAlta (7.5)—

Next.js is a React framework. In versions of Next.js prior to 12.0.5 or 11.1.3, invalid or malformed URLs could lead to a server crash. In order to be affected by this issue, the deployment must use Next.js versions above 11.1.0 and below 12.0.5, Node.js above 15.0.0, and next start or a custom server. Deployments on Vercel are not affected, along with similar environments where invalid requests are filtered before reaching Next.js. Versions 12.0.5 and 11.1.3 contain patches for this issue.

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)

Vercel — Next.js

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-43803",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "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": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "vercel",
          "product": "next.js",
          "versions": [
            {
              "status": "affected",
              "version": ">= 11.1.0, < 11.1.3"
            },
            {
              "status": "affected",
              "version": ">= 12.0.0, < 12.0.5"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-10T00:15:11.827",
  "references": [
    {
      "url": "https://github.com/vercel/next.js/commit/6d98b4fb4315dec1badecf0e9bdc212a4272b264",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/vercel/next.js/pull/32080",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/vercel/next.js/releases/tag/v11.1.3",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/vercel/next.js/releases/v12.0.5",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/vercel/next.js/security/advisories/GHSA-25mp-g6fv-mqxx",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/vercel/next.js/commit/6d98b4fb4315dec1badecf0e9bdc212a4272b264",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/vercel/next.js/pull/32080",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/vercel/next.js/releases/tag/v11.1.3",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/vercel/next.js/releases/v12.0.5",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/vercel/next.js/security/advisories/GHSA-25mp-g6fv-mqxx",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Next.js is a React framework. In versions of Next.js prior to 12.0.5 or 11.1.3, invalid or malformed URLs could lead to a server crash. In order to be affected by this issue, the deployment must use Next.js versions above 11.1.0 and below 12.0.5, Node.js above 15.0.0, and next start or a custom server. Deployments on Vercel are not affected, along with similar environments where invalid requests are filtered before reaching Next.js. Versions 12.0.5 and 11.1.3 contain patches for this issue."
    },
    {
      "lang": "es",
      "value": "Next.js es un framework de React. En las versiones de Next.js anteriores a 12.0.5 o 11.1.3, las direcciones URL no válidas o malformadas podrían conllevar a un bloqueo del servidor. Para verse afectado por este problema, el despliegue debe usar versiones de Next.js superiores a 11.1.0 y anteriores a 12.0.5, Node.js versiones posteriores a 15.0.0, y el siguiente inicio o un servidor personalizado. Los despliegues en Vercel no están afectados, junto con entornos similares en los que las peticiones no válidas son filtradas antes de llegar a Next.js. Las versiones 12.0.5 y 11.1.3 contienen parches para este problema"
    }
  ],
  "lastModified": "2026-06-17T04:11:28.210",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D413EFEB-941C-4FDD-BA04-32B7902BCFE7",
              "versionEndExcluding": "11.1.3",
              "versionStartIncluding": "11.1.0"
            },
            {
              "criteria": "cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C1457A80-9287-4C15-9AF3-8CE57500C4AA",
              "versionEndExcluding": "12.0.5",
              "versionStartIncluding": "12.0.0"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nodejs:node.js:*:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "2B44D2C4-15DF-4918-B374-3C780CC43ACC",
              "versionStartExcluding": "15.0.0"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}