{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-43842",
        "STATE": "PUBLIC",
        "TITLE": "Stored XSS via SVG file upload in Wiki.js"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "wiki",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 2.5.258 (development)"
                                        },
                                        {
                                            "version_value": "< 2.5.260 (production)"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Requarks"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Wiki.js is a wiki app built on Node.js. Wiki.js versions 2.5.257 and earlier are vulnerable to stored cross-site scripting through a SVG file upload. By creating a crafted SVG file, a malicious Wiki.js user may stage a stored cross-site scripting attack. This allows the attacker to execute malicious JavaScript when the SVG is viewed directly by other users. Scripts do not execute when loaded inside a page via normal `<img>` tags. Commit 5d3e81496fba1f0fbd64eeb855f30f69a9040718 fixes this vulnerability by adding an optional (enabled by default) SVG sanitization step to all file uploads that match the SVG mime type. As a workaround, disable file upload for all non-trusted users. Wiki.js version 2.5.260 is the first production version to contain a patch. Version 2.5.258 is the first development build to contain a patch and is available only as a Docker image as requarks/wiki:canary-2.5.258."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/Requarks/wiki/security/advisories/GHSA-3qv4-gp35-rgh7",
                "refsource": "CONFIRM",
                "url": "https://github.com/Requarks/wiki/security/advisories/GHSA-3qv4-gp35-rgh7"
            },
            {
                "name": "https://github.com/Requarks/wiki/commit/5d3e81496fba1f0fbd64eeb855f30f69a9040718",
                "refsource": "MISC",
                "url": "https://github.com/Requarks/wiki/commit/5d3e81496fba1f0fbd64eeb855f30f69a9040718"
            },
            {
                "name": "https://github.com/Requarks/wiki/releases/tag/2.5.260",
                "refsource": "MISC",
                "url": "https://github.com/Requarks/wiki/releases/tag/2.5.260"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-3qv4-gp35-rgh7",
        "discovery": "UNKNOWN"
    }
}