CVE-2025-5276 – mcp-markdownify-server

Package

Manager: npm
Name: mcp-markdownify-server
Vulnerable Version: >=0 <=0.0.1

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:P

EPSS: 0.00041 pctl0.11391

Details

Markdownify MCP Server allows Server-Side Request Forgery (SSRF) via the Markdownify.get() function All versions of the package mcp-markdownify-server 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.

Metadata

Created: 2025-05-29T06:31:17Z
Modified: 2025-05-29T17:27:26Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/05/GHSA-frq9-3hp2-xvxg/GHSA-frq9-3hp2-xvxg.json
CWE IDs: ["CWE-918"]
Alternative ID: GHSA-frq9-3hp2-xvxg
Finding: F100
Auto approve: 1