{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2021-47836",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-01-14T17:11:19.901Z",
        "datePublished": "2026-01-16T19:09:36.197Z",
        "dateUpdated": "2026-05-25T23:41:15.697Z"
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                "dateUpdated": "2026-05-25T23:41:15.697Z"
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            "datePublic": "2021-04-05T00:00:00.000Z",
            "title": "Markdown Explorer 0.1.1 - Persistent Cross-Site Scripting",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Markdown Explorer 0.1.1 contains a cross-site scripting vulnerability that allows attackers to inject malicious code through file uploads and editor inputs. Attackers can upload markdown files with embedded JavaScript payloads that execute in the application's privileged renderer context, allowing code execution on the host."
                }
            ],
            "affected": [
                {
                    "vendor": "jersou",
                    "product": "Markdown Explorer",
                    "versions": [
                        {
                            "version": "0.1.1",
                            "status": "affected"
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            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
                            "cweId": "CWE-79",
                            "type": "CWE"
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            ],
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                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
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                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 5.1,
                        "baseSeverity": "MEDIUM",
                        "privilegesRequired": "NONE",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "LOW",
                        "subIntegrityImpact": "LOW",
                        "userInteraction": "ACTIVE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
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                    "format": "CVSS"
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                        "attackVector": "NETWORK",
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                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "CHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
                        "version": "3.1"
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                    "format": "CVSS"
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            ],
            "references": [
                {
                    "url": "https://www.exploit-db.com/exploits/49826",
                    "name": "ExploitDB-49826",
                    "tags": [
                        "exploit"
                    ]
                },
                {
                    "url": "https://github.com/jersou/markdown-explorer",
                    "name": "Markdown Explorer GitHub Repository",
                    "tags": [
                        "product"
                    ]
                },
                {
                    "url": "https://imgur.com/a/w4bcPWs",
                    "name": "Proof of Concept Video",
                    "tags": [
                        "exploit"
                    ]
                },
                {
                    "name": "VulnCheck Advisory: Markdown Explorer 0.1.1 - Persistent Cross-Site Scripting",
                    "tags": [
                        "third-party-advisory"
                    ],
                    "url": "https://www.vulncheck.com/advisories/markdown-explorer-persistent-cross-site-scripting"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "TaurusOmar",
                    "type": "finder"
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                "engine": "vulncheck"
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                "references": [
                    {
                        "url": "https://www.vulncheck.com/advisories/markdown-explorer-persistent-cross-site-scripting",
                        "tags": [
                            "exploit"
                        ]
                    }
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                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-01-16T21:00:44.698156Z",
                                "id": "CVE-2021-47836",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-01-16T21:10:01.232Z"
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}