CVE-2026-8661 (GCVE-0-2026-8661)
Vulnerability from cvelistv5 – Published: 2026-06-26 01:59 – Updated: 2026-07-24 03:10
VLAI
EPSS
VEX
Title
Server-Side Cross-Site Scripting and SSRF in Rapid7 InsightConnect Markdown to PDF Plugin
Summary
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.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 12:23 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/rapid7/insightconnect-plugins/… | vendor-advisory |
| https://github.com/rapid7/insightconnect-plugins/… | patch |
| https://github.com/rapid7/insightconnect-plugins/… | patch |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Rapid7 | InsightConnect Markdown Plugin |
Affected:
0 , < 4.0.2
(custom)
Unaffected: 4.0.2 (custom) |
guessed |
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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