Vulnerability · Published May 29, 2025 · Assigned by snyk
CVE-2025-5276
High 7.4
In plain English
A high-severity server-side request forgery in mcp-markdownify-server. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | mcp-markdownify-server | no fix listed | GHSA-frq9-3hp2-xvxg |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | mcp-markdownify-server | 0 – before 1.0.0 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:P