---
id: CVE-2025-5276
title: >-
  Versions of the package mcp-markdownify-server before 1.0.0 are vulnerable to
  Server-Side Request Forgery (SSRF) via the Markdownify.get() function
summary: >-
  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 webpa…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N'
cwe:
  - CWE-918
  - CWE-918
published: '2025-05-29'
updated: '2026-07-02'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-5276'
references:
  - url: >-
      https://github.com/zcaceres/markdownify-mcp/blob/224cf89f0d58616d2a5522f60f184e8391d1c9e3/src/server.ts%23L20C17-L20C29
    label: report@snyk.io
  - url: >-
      https://github.com/zcaceres/markdownify-mcp/commit/0284aa8f34d32c65e20d8cda2d429b7943c9af03
    label: report@snyk.io
  - url: 'https://security.snyk.io/vuln/SNYK-JS-MCPMARKDOWNIFYSERVER-10249387'
    label: report@snyk.io
  - url: 'https://security.snyk.io/vuln/SNYK-JS-MCPMARKDOWNIFYSERVER-10249387'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.004
epssPercentile: 0.34106
ingestedAt: '2026-07-02T16:39:34.558Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.