{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "Vercel heeft een kwetsbaarheid verholpen in Next.js (Specifiek voor versies 14.2.25 en 15.2.3)",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "Next.js is een populair framework voor het ontwikkelen van web-applicaties. De kwetsbaarheid bevindt zich in de manier waarop Next.js authenticatiecontroles in de eigen middleware verwerkt. Dit stelt kwaadwillenden in staat om deze controles te omzeilen, wat kan leiden tot ongeautoriseerde toegang tot gevoelige gegevens en functionaliteiten, waaronder mogelijk de beheer-interface van de getroffen applicaties.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "Vercel heeft updates uitgebracht om de kwetsbaarheid te verhelpen. Zie bijgevoegde referenties voor meer informatie. Indien het inzetten van de updates (nog) niet mogelijk is op korte termijn, heeft Vercel ook een mitigerende maatregel gepubliceerd, om het risico van misbruik te verkleinen.\n\nBlokkeer externe requests welke de header `x-middleware-subrequest` bevat.",
        "title": "Oplossingen"
      },
      {
        "category": "general",
        "text": "medium",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Improper Authorization",
        "title": "CWE-285"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
      "namespace": "https://www.ncsc.nl/"
    },
    "references": [
      {
        "category": "external",
        "summary": "Reference - ncscclear",
        "url": "https://nextjs.org/blog/cve-2025-29927"
      }
    ],
    "title": "Kwetsbaarheid verholpen in Next.js",
    "tracking": {
      "current_release_date": "2025-03-25T08:38:53.524904Z",
      "generator": {
        "date": "2025-02-25T15:15:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.0"
        }
      },
      "id": "NCSC-2025-0096",
      "initial_release_date": "2025-03-25T08:38:53.524904Z",
      "revision_history": [
        {
          "date": "2025-03-25T08:38:53.524904Z",
          "number": "1.0.0",
          "summary": "Initiele versie"
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/\u003e14.0.0|\u003c14.2.25",
                "product": {
                  "name": "vers:unknown/\u003e14.0.0|\u003c14.2.25",
                  "product_id": "CSAFPID-2542687"
                }
              },
              {
                "category": "product_version_range",
                "name": "vers:unknown/\u003e15.0.0|\u003c15.2.3",
                "product": {
                  "name": "vers:unknown/\u003e15.0.0|\u003c15.2.3",
                  "product_id": "CSAFPID-2542688"
                }
              },
              {
                "category": "product_version_range",
                "name": "vers:unknown/\u003e=11.1.4|\u003c=13.5.6",
                "product": {
                  "name": "vers:unknown/\u003e=11.1.4|\u003c=13.5.6",
                  "product_id": "CSAFPID-2542686"
                }
              },
              {
                "category": "product_version_range",
                "name": "vers:unknown/unknown",
                "product": {
                  "name": "vers:unknown/unknown",
                  "product_id": "CSAFPID-2552436"
                }
              }
            ],
            "category": "product_name",
            "name": "Next.js"
          }
        ],
        "category": "vendor",
        "name": "Vercel"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-29927",
      "cwe": {
        "id": "CWE-285",
        "name": "Improper Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Authorization",
          "title": "CWE-285"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-2542687",
          "CSAFPID-2542688",
          "CSAFPID-2542686",
          "CSAFPID-2552436"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-29927",
          "url": "https://api.ncsc.nl/velma/v1/vulnerabilities/2025/CVE-2025-29927.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-2542687",
            "CSAFPID-2542688",
            "CSAFPID-2542686",
            "CSAFPID-2552436"
          ]
        }
      ],
      "title": "CVE-2025-29927"
    }
  ]
}