CVE-2026-8661
Server-Side Cross-Site Scripting and SSRF in Rapid7 InsightConnect Markdown to PDF Plugin
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.
INFO
Published Date :
June 26, 2026, 1:59 a.m.
Last Modified :
June 26, 2026, 1:59 a.m.
Remotely Exploit :
Yes !
Source :
rapid7
Affected Products
The following products are affected by CVE-2026-8661
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 9974b330-7714-4307-a722-5648477acda7 |
Solution
- Update the InsightConnect Markdown Plugin to version 3.1.5.
- Apply vendor-supplied security patches immediately.
- Restrict outbound network access for the plugin.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-8661 vulnerability anywhere in the article.