FKIE_CVE-2025-30218

Vulnerability from fkie_nvd - Published: 2025-04-02 22:15 - Updated: 2026-06-17 09:08
Severity
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this subrequest ID is sent to all requests, even if the destination is not the same host as the Next.js application. Initiating a fetch request to a third-party within Middleware will send the x-middleware-subrequest-id to that third party. This vulnerability is fixed in 12.3.6, 13.5.10, 14.2.26, and 15.2.4.
References
security-advisories@github.comhttps://github.com/vercel/next.js/security/advisories/GHSA-223j-4rm8-mrmfVendor Advisory
security-advisories@github.comhttps://vercel.com/changelog/cve-2025-30218-5DREmEH765PoeAsrNNQj3OVendor Advisory
Impacted products
Vendor Product Version
vercel next.js 12.3.5
vercel next.js 13.5.9
vercel next.js 14.2.25
vercel next.js 15.2.3
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "next.js",
          "vendor": "vercel",
          "versions": [
            {
              "status": "affected",
              "version": "= 12.3.5"
            },
            {
              "status": "affected",
              "version": "= 13.5.9"
            },
            {
              "status": "affected",
              "version": "= 14.2.25"
            },
            {
              "status": "affected",
              "version": "= 15.2.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:vercel:next.js:12.3.5:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "B02B68D7-FB03-4BC8-B8B3-25A3810483F0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:vercel:next.js:13.5.9:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "CC945F11-B55E-4DB9-9088-21E47CDA0D42",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:vercel:next.js:14.2.25:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "E0A872E1-917A-44A7-BD62-B55EE12DE1FC",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:vercel:next.js:15.2.3:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "FC700B96-A321-4560-9D31-95894B8D95C4",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this subrequest ID is sent to all requests, even if the destination is not the same host as the Next.js application. Initiating a fetch request to a third-party within Middleware will send the x-middleware-subrequest-id to that third party. This vulnerability is fixed in 12.3.6, 13.5.10, 14.2.26, and 15.2.4."
    },
    {
      "lang": "es",
      "value": "Next.js es un React framework para construir aplicaciones web de pila completa. Para mitigar CVE-2025-29927, Next.js valid\u00f3 el ID X-Middleware-subrequest que persisti\u00f3 en m\u00faltiples solicitudes entrantes. Sin embargo, esta ID de subrequest se env\u00eda a todas las solicitudes, incluso si el destino no es el mismo host que la aplicaci\u00f3n Next.js. Iniciar una solicitud de recuperaci\u00f3n a un tercero dentro de Middleware enviar\u00e1 el ID de subrequest de X-Middleware a ese tercero. Esta vulnerabilidad se fija en 12.3.6, 13.5.10, 14.2.26 y 15.2.4."
    }
  ],
  "id": "CVE-2025-30218",
  "lastModified": "2026-06-17T09:08:22.653",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 1.7,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "UNREPORTED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-30218",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-04-03T13:43:59.337390Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-04-02T22:15:19.940",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/vercel/next.js/security/advisories/GHSA-223j-4rm8-mrmf"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://vercel.com/changelog/cve-2025-30218-5DREmEH765PoeAsrNNQj3O"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.