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OpenAdvisories
High · 7.4 CVE-2025-5276 EUVD-2025-16365GHSA-frq9-3hp2-xvxg

Markdownify MCP Server allows Server-Side Request Forgery (SSRF) via the Markdownify.get() function

Published May 29, 2025 · Updated Aug 5, 2026 · Assigned by snyk

Description

Versions of the package mcp-markdownify-server before 1.0.0 are vulnerable to Server-Side Request Forgery (SSRF) via the Markdownify.get() function. An attacker can craft a prompt that, once accessed by the MCP host, can invoke the webpage-to-markdown, bing-search-to-markdown, and youtube-to-markdown tools to issue requests and read the responses to attacker-controlled URLs, potentially leaking sensitive information.

Affected products

VendorProductAffectedFixed
— mcp-markdownify-server < 1.0.0 1.0.0

Affected packages

EcosystemPackageAffectedFixedRecord
npm mcp-markdownify-server <= 0.0.1 — GHSA-frq9-3hp2-xvxg

References