{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-43803",
        "STATE": "PUBLIC",
        "TITLE": "Unexpected server crash in Next.js"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "next.js",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": ">= 11.1.0, < 11.1.3"
                                        },
                                        {
                                            "version_value": ">= 12.0.0, < 12.0.5"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "vercel"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "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."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-20: Improper Input Validation"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/vercel/next.js/security/advisories/GHSA-25mp-g6fv-mqxx",
                "refsource": "CONFIRM",
                "url": "https://github.com/vercel/next.js/security/advisories/GHSA-25mp-g6fv-mqxx"
            },
            {
                "name": "https://github.com/vercel/next.js/pull/32080",
                "refsource": "MISC",
                "url": "https://github.com/vercel/next.js/pull/32080"
            },
            {
                "name": "https://github.com/vercel/next.js/commit/6d98b4fb4315dec1badecf0e9bdc212a4272b264",
                "refsource": "MISC",
                "url": "https://github.com/vercel/next.js/commit/6d98b4fb4315dec1badecf0e9bdc212a4272b264"
            },
            {
                "name": "https://github.com/vercel/next.js/releases/tag/v11.1.3",
                "refsource": "MISC",
                "url": "https://github.com/vercel/next.js/releases/tag/v11.1.3"
            },
            {
                "name": "https://github.com/vercel/next.js/releases/v12.0.5",
                "refsource": "MISC",
                "url": "https://github.com/vercel/next.js/releases/v12.0.5"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-25mp-g6fv-mqxx",
        "discovery": "UNKNOWN"
    }
}