CVE-2026-8661

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8661", "assignerOrgId": "9974b330-7714-4307-a722-5648477acda7", "state": "PUBLISHED", "assignerShortName": "rapid7", "dateReserved": "2026-05-15T06:29:03.740Z", "datePublished": "2026-06-26T01:59:58.963Z", "dateUpdated": "2026-07-24T03:10:45.058Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "9974b330-7714-4307-a722-5648477acda7", "shortName": "rapid7", "dateUpdated": "2026-07-24T03:10:45.058Z"}, "title": "Server-Side Cross-Site Scripting and SSRF in Rapid7 InsightConnect Markdown to PDF Plugin", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}, {"lang": "en", "cweId": "CWE-918", "description": "CWE-918 Server-Side Request Forgery (SSRF)", "type": "CWE"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "Server-Side Request Forgery, Information Disclosure"}]}], "affected": [{"vendor": "Rapid7", "product": "InsightConnect Markdown Plugin", "platforms": ["Linux"], "versions": [{"status": "affected", "version": "0", "lessThan": "4.0.2", "versionType": "custom"}, {"status": "unaffected", "version": "4.0.2", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Server-Side Request Forgery in the markdown_to_pdf action of Rapid7 InsightConnect Markdown Plugin on Linux in versions prior to 4.0.2 allows remote attackers to make arbitrary outbound HTTP requests via unsanitized resource-loading HTML elements (img/src, CSS url(), @import) embedded in Markdown input. The initial fix in 4.0.0 disabled JavaScript but did not neutralize resource-loading vectors. Resolved in 4.0.2 by sanitizing HTML with an allowlist of tags, attributes, and URL schemes.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Server-Side Request Forgery in the markdown_to_pdf action of Rapid7 InsightConnect Markdown Plugin on Linux in versions prior to 4.0.2 allows remote attackers to make arbitrary outbound HTTP requests via unsanitized resource-loading HTML elements (img/src, CSS url(), @import) embedded in Markdown input. The initial fix in 4.0.0 disabled JavaScript but did not neutralize resource-loading vectors. Resolved in 4.0.2 by sanitizing HTML with an allowlist of tags, attributes, and URL schemes."}]}], "references": [{"url": "https://github.com/rapid7/insightconnect-plugins/blob/master/plugins/markdown/help.md", "tags": ["vendor-advisory"]}, {"url": "https://github.com/rapid7/insightconnect-plugins/pull/3721", "tags": ["patch"]}, {"url": "https://github.com/rapid7/insightconnect-plugins/pull/4010", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseSeverity": "MEDIUM", "baseScore": 4.8, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"}}], "solutions": [{"lang": "en", "value": "Upgrade to InsightConnect Markdown Plugin version 4.0.2 or later.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Upgrade to InsightConnect Markdown Plugin version 4.0.2 or later.</p>"}]}], "credits": [{"lang": "en", "value": "Jacob Steadman, Rapid7", "type": "finder"}, {"lang": "en", "value": "Jed Starr, Rapid7", "type": "finder"}, {"lang": "en", "value": "SnailSploit (Kai Aizen)", "type": "reporter"}], "source": {"discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-26T12:23:45.269146Z", "id": "CVE-2026-8661", "options": [{"Exploitation": "none"}, {"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": "2026-06-26T12:24:03.302Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-8661", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-26T12:23:45.269146Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-26T12:23:49.835Z"}}], "cna": {"title": "Server-Side Cross-Site Scripting and SSRF in Rapid7 InsightConnect Markdown to PDF Plugin", "source": {"discovery": "INTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Jacob Steadman, Rapid7"}, {"lang": "en", "type": "finder", "value": "Jed Starr, Rapid7"}, {"lang": "en", "type": "reporter", "value": "SnailSploit (Kai Aizen)"}], "impacts": [{"descriptions": [{"lang": "en", "value": "Server-Side Request Forgery, Information Disclosure"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Rapid7", "product": "InsightConnect Markdown Plugin", "versions": [{"status": "affected", "version": "0", "lessThan": "4.0.2", "versionType": "custom"}, {"status": "unaffected", "version": "4.0.2", "versionType": "custom"}], "platforms": ["Linux"], "defaultStatus": "unaffected"}], "solutions": [{"lang": "en", "value": "Upgrade to InsightConnect Markdown Plugin version 4.0.2 or later.", "supportingMedia": [{"type": "text/html", "value": "<p>Upgrade to InsightConnect Markdown Plugin version 4.0.2 or later.</p>", "base64": false}]}], "references": [{"url": "https://github.com/rapid7/insightconnect-plugins/blob/master/plugins/markdown/help.md", "tags": ["vendor-advisory"]}, {"url": "https://github.com/rapid7/insightconnect-plugins/pull/3721", "tags": ["patch"]}, {"url": "https://github.com/rapid7/insightconnect-plugins/pull/4010", "tags": ["patch"]}], "x_generator": {"engine": "Vulnogram 1.0.2"}, "descriptions": [{"lang": "en", "value": "Server-Side Request Forgery in the markdown_to_pdf action of Rapid7 InsightConnect Markdown Plugin on Linux in versions prior to 4.0.2 allows remote attackers to make arbitrary outbound HTTP requests via unsanitized resource-loading HTML elements (img/src, CSS url(), @import) embedded in Markdown input. The initial fix in 4.0.0 disabled JavaScript but did not neutralize resource-loading vectors. Resolved in 4.0.2 by sanitizing HTML with an allowlist of tags, attributes, and URL schemes.", "supportingMedia": [{"type": "text/html", "value": "Server-Side Request Forgery in the markdown_to_pdf action of Rapid7 InsightConnect Markdown Plugin on Linux in versions prior to 4.0.2 allows remote attackers to make arbitrary outbound HTTP requests via unsanitized resource-loading HTML elements (img/src, CSS url(), @import) embedded in Markdown input. The initial fix in 4.0.0 disabled JavaScript but did not neutralize resource-loading vectors. Resolved in 4.0.2 by sanitizing HTML with an allowlist of tags, attributes, and URL schemes.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}, {"lang": "en", "type": "CWE", "cweId": "CWE-918", "description": "CWE-918 Server-Side Request Forgery (SSRF)"}]}], "providerMetadata": {"orgId": "9974b330-7714-4307-a722-5648477acda7", "shortName": "rapid7", "dateUpdated": "2026-07-24T03:10:45.058Z"}}}, "cveMetadata": {"cveId": "CVE-2026-8661", "state": "PUBLISHED", "dateUpdated": "2026-07-24T03:10:45.058Z", "dateReserved": "2026-05-15T06:29:03.740Z", "assignerOrgId": "9974b330-7714-4307-a722-5648477acda7", "datePublished": "2026-06-26T01:59:58.963Z", "assignerShortName": "rapid7"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "platforms": ["Linux"], "product": "InsightConnect Markdown Plugin", "vendor": "Rapid7", "versions": [{"lessThan": "4.0.2", "status": "affected", "version": "0", "versionType": "custom"}, {"status": "unaffected", "version": "4.0.2", "versionType": "custom"}]}], "source": "cve@rapid7.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Server-Side Request Forgery in the markdown_to_pdf action of Rapid7 InsightConnect Markdown Plugin on Linux in versions prior to 4.0.2 allows remote attackers to make arbitrary outbound HTTP requests via unsanitized resource-loading HTML elements (img/src, CSS url(), @import) embedded in Markdown input. The initial fix in 4.0.0 disabled JavaScript but did not neutralize resource-loading vectors. Resolved in 4.0.2 by sanitizing HTML with an allowlist of tags, attributes, and URL schemes."}, {"lang": "es", "value": "Vulnerabilidad de cross-site scripting del lado del servidor y de falsificaci\u00f3n de petici\u00f3n del lado del servidor en la acci\u00f3n markdown_to_pdf del plugin Rapid7 InsightConnect Markdown versi\u00f3n 3.1.4 y anteriores en Linux permite a atacantes remotos ejecutar JavaScript del lado del servidor y realizar peticiones HTTP salientes arbitrarias a trav\u00e9s de contenido manipulado incrustado en la entrada Markdown. El motor de renderizado de PDF no restringe la ejecuci\u00f3n de scripts ni el acceso a la red saliente."}], "id": "CVE-2026-8661", "lastModified": "2026-10-25T22:10:00.150", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 2.5, "source": "cve@rapid7.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8661", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-26T12:23:45.269146Z", "version": "2.0.3"}}]}, "published": "2026-06-26T02:16:54.640", "references": [{"source": "cve@rapid7.com", "url": "https://github.com/rapid7/insightconnect-plugins/blob/master/plugins/markdown/help.md"}, {"source": "cve@rapid7.com", "url": "https://github.com/rapid7/insightconnect-plugins/pull/3721"}, {"source": "cve@rapid7.com", "url": "https://github.com/rapid7/insightconnect-plugins/pull/4010"}], "sourceIdentifier": "cve@rapid7.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-918"}], "source": "cve@rapid7.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["linux"], "status": "affected", "versions": {"scheme": "generic", "value": "[0,4.0.0)"}}, {"platform": ["linux"], "status": "unaffected", "versions": {"scheme": "semver", "value": "4.0.0"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "InsightConnect Markdown Plugin", "source": "cna", "vendor": "Rapid7"}, "product": "insightconnect_markdown_plugin", "vendor": "rapid7"}], "created": "2026-06-26T03:30:07.167447+00:00", "updated": "2026-08-04T08:30:05.453871+00:00", "vendors": ["rapid7", "rapid7$PRODUCT$insightconnect_markdown_plugin"]}