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CVE-2026-8661

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

Published: Jun 26, 2026Updated: Jul 24, 2026 Sources: CVE List NVDCWE-79
4.8MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 84.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79CWE-918

Affected Products

Rapid7
commercial·USaka rapid7 nexpose, metasploit, rapid7 velociraptor
InsightConnect Markdown PluginLibraryLibrary
Security Products / vuln-mgmt-scanner

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

4 techniques
Command and Control
Execution
Initial Access
View detailed technique mapping

References

https://github.com/rapid7/insightconnect-plugins/blob/master/plugins/markdown/help.md
github.com
https://github.com/rapid7/insightconnect-plugins/pull/3721
github.com
https://github.com/rapid7/insightconnect-plugins/pull/4010
github.com

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