Vulnerability-Lookup

GHSA-6R62-QF74-XPGG

Vulnerability from github – Published: 2026-06-26 03:31 – Updated: 2026-06-26 03:31

Details

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.

Severity

4.8 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-8661"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-26T02:16:54Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-6r62-qf74-xpgg",
  "modified": "2026-06-26T03:31:30Z",
  "published": "2026-06-26T03:31:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8661"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rapid7/insightconnect-plugins/pull/3721"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rapid7/insightconnect-plugins/blob/master/plugins/markdown/help.md"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-8661 (GCVE-0-2026-8661)

Vulnerability from cvelistv5 – Published: 2026-06-26 01:59 – Updated: 2026-06-26 12:24

Title

Server-Side Cross-Site Scripting and SSRF in Rapid7 InsightConnect Markdown to PDF Plugin

Summary

Severity

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

rapid7

References

2 references

URL	Tags
https://github.com/rapid7/insightconnect-plugins/…	vendor-advisory
https://github.com/rapid7/insightconnect-plugins/…	patch

Impacted products

1 product

Vendor	Product	Version
Rapid7	InsightConnect Markdown Plugin	Affected: 0 , < 4.0.0 (custom) Unaffected: 4.0.0 (custom)

Credits

Jacob Steadman, Rapid7 Jed Starr, Rapid7

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-8661",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-26T12:23:45.269146Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-26T12:24:03.302Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Linux"
          ],
          "product": "InsightConnect Markdown Plugin",
          "vendor": "Rapid7",
          "versions": [
            {
              "lessThan": "4.0.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "4.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Jacob Steadman, Rapid7"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Jed Starr, Rapid7"
        }
      ],
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          "lang": "en",
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              "type": "text/html",
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            }
          ],
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        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
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            "attackVector": "NETWORK",
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            "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"
          },
          "format": "CVSS",
          "scenarios": [
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              "lang": "en",
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      "providerMetadata": {
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        "orgId": "9974b330-7714-4307-a722-5648477acda7",
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      "references": [
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          "url": "https://github.com/rapid7/insightconnect-plugins/blob/master/plugins/markdown/help.md"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/rapid7/insightconnect-plugins/pull/3721"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "Server-Side Cross-Site Scripting and SSRF in Rapid7 InsightConnect Markdown to PDF Plugin",
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9974b330-7714-4307-a722-5648477acda7",
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    "datePublished": "2026-06-26T01:59:58.963Z",
    "dateReserved": "2026-05-15T06:29:03.740Z",
    "dateUpdated": "2026-06-26T12:24:03.302Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-6R62-QF74-XPGG

CVE-2026-8661 (GCVE-0-2026-8661)

Tags

Sightings

Nomenclature