{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-29441",
        "STATE": "PUBLIC",
        "TITLE": "Authentication bypass"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "nacos",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 1.4.1"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "alibaba"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-290 Authentication Bypass by Spoofing"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/alibaba/nacos/issues/4701",
                "refsource": "MISC",
                "url": "https://github.com/alibaba/nacos/issues/4701"
            },
            {
                "name": "https://github.com/advisories/GHSA-36hp-jr8h-556f",
                "refsource": "CONFIRM",
                "url": "https://github.com/advisories/GHSA-36hp-jr8h-556f"
            },
            {
                "name": "https://github.com/alibaba/nacos/pull/4703",
                "refsource": "MISC",
                "url": "https://github.com/alibaba/nacos/pull/4703"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-36hp-jr8h-556f",
        "discovery": "UNKNOWN"
    }
}