{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-39185",
        "STATE": "PUBLIC",
        "TITLE": "Default CORS config allows any origin with credentials"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "http4s",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 0.21.27"
                                        },
                                        {
                                            "version_value": ">= 0.22.0, < 0.22.3"
                                        },
                                        {
                                            "version_value": ">= 0.23.0, < 0.23.2"
                                        },
                                        {
                                            "version_value": ">= 1.0.0-M1, <= 1.0.0-M24"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "http4s"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Http4s is a minimal, idiomatic Scala interface for HTTP services. In http4s versions 0.21.26 and prior, 0.22.0 through 0.22.2, 0.23.0, 0.23.1, and 1.0.0-M1 through 1.0.0-M24, the default CORS configuration is vulnerable to an origin reflection attack. The middleware is also susceptible to a Null Origin Attack. The problem is fixed in 0.21.27, 0.22.3, 0.23.2, and 1.0.0-M25. The original `CORS` implementation and `CORSConfig` are deprecated. See the GitHub GHSA for more information, including code examples and workarounds."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-346: Origin Validation Error"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/http4s/http4s/security/advisories/GHSA-52cf-226f-rhr6",
                "refsource": "CONFIRM",
                "url": "https://github.com/http4s/http4s/security/advisories/GHSA-52cf-226f-rhr6"
            },
            {
                "name": "https://github.com/http4s/http4s/releases/tag/v0.23.2",
                "refsource": "MISC",
                "url": "https://github.com/http4s/http4s/releases/tag/v0.23.2"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-52cf-226f-rhr6",
        "discovery": "UNKNOWN"
    }
}