{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-39195",
        "STATE": "PUBLIC",
        "TITLE": "Server-Side Request Forgery vulnerability in misskey"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "misskey",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 12.90.0"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "misskey-dev"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Misskey is an open source, decentralized microblogging platform. In affected versions a Server-Side Request Forgery vulnerability exists in \"Upload from URL\" and remote attachment handling. This could result in the disclosure of non-public information within the internal network. This has been fixed in 12.90.0. However, if you are using a proxy, you will need to take additional measures. As a workaround this exploit may be avoided by appropriately restricting access to private networks from the host where the application is running."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-918: Server-Side Request Forgery (SSRF)"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/misskey-dev/misskey/security/advisories/GHSA-mqv7-gxh4-r5vf",
                "refsource": "CONFIRM",
                "url": "https://github.com/misskey-dev/misskey/security/advisories/GHSA-mqv7-gxh4-r5vf"
            },
            {
                "name": "https://github.com/misskey-dev/misskey/commit/e1a8b158e04ad567d92d8daf3cc0898ee18f1a2e",
                "refsource": "MISC",
                "url": "https://github.com/misskey-dev/misskey/commit/e1a8b158e04ad567d92d8daf3cc0898ee18f1a2e"
            },
            {
                "name": "https://github.com/misskey-dev/misskey/blob/develop/CHANGELOG.md#12900-20210904",
                "refsource": "MISC",
                "url": "https://github.com/misskey-dev/misskey/blob/develop/CHANGELOG.md#12900-20210904"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-mqv7-gxh4-r5vf",
        "discovery": "UNKNOWN"
    }
}