Server-Side Cross-Site Scripting and SSRF in Rapid7 InsightConnect Markdown to PDF Plugin_CVE-2026-8661

{
    "lastseen": "",
    "description": "Server-Side Cross-Site Scripting and Server-Side Request Forgery vulnerability in the markdown_to_pdf action of Rapid7 InsightConnect Markdown Plugin version 3.1.4 and earlier on Linux allows remote attackers to execute JavaScript server-side and make arbitrary outbound HTTP requests via crafted content embedded in Markdown input. The PDF rendering engine does not restrict script execution or outbound network access.",
    "published": "2026-06-26T01:59:58.963Z",
    "modified": "2026-06-26T01:59:58.963Z",
    "type": "cve",
    "title": "Server-Side Cross-Site Scripting and SSRF in Rapid7 InsightConnect Markdown to PDF Plugin",
    "source": "rapid7",
    "references": "https://github.com/rapid7/insightconnect-plugins/blob/master/plugins/markdown/help.md\nhttps://github.com/rapid7/insightconnect-plugins/pull/3721",
    "id": "CVE-2026-8661",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79",
        "CWE-918"
    ],
    "cvelist": null,
    "sourceData": "Rapid7 InsightConnect Markdown Plugin 0",
    "sourceHref": "",
    "cvss": {
        "score": 4.8,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "InsightConnect Markdown Plugin",
    "version": "0",
    "vendor": "Rapid7",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}