CVE-2026-8661

MEDIUM

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

Title source: cna

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.

References (2)

Core 2

Core References

Vendor Advisory vendor-advisory

https://github.com/rapid7/insightconnect-plugins/blob/master/plugins/markdown/help.md

Patch patch

https://github.com/rapid7/insightconnect-plugins/pull/3721

Scores

CVSS v3 4.8

EPSS 0.0025

EPSS Percentile 16.7%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-79 CWE-918

Status published

Products (2)

Rapid7/InsightConnect Markdown Plugin < 4.0.0

Rapid7/InsightConnect Markdown Plugin 4.0.0

Published Jun 26, 2026

Tracked Since Jun 26, 2026