CVEs-PoC/2025/CVE-2025-5276.md

CVE-2025-5276

Description

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.

POC

Reference

• https://security.snyk.io/vuln/SNYK-JS-MCPMARKDOWNIFYSERVER-10249387

Github

• https://github.com/ARPSyndicate/cve-scores