high7.4
CVE-2025-5276
Markdownify MCP Server allows Server-Side Request Forgery (SSRF) via the Markdownify.get() function
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | mcp-markdownify-server | <= 0.0.1 | none recorded |
Affected products
| Product | Affected versions |
|---|---|
| Package Mcp-Markdownify-Server | before 1.0.0 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/zcaceres/markdownify-mcp/blob/224cf89f0d58616d2a5522f60f184e8391d1c9e3/src/server.ts%23L20C17-L20C29
- https://github.com/zcaceres/markdownify-mcp/commit/0284aa8f34d32c65e20d8cda2d429b7943c9af03
- https://security.snyk.io/vuln/SNYK-JS-MCPMARKDOWNIFYSERVER-10249387
- https://github.com/advisories/GHSA-frq9-3hp2-xvxg
- https://nvd.nist.gov/vuln/detail/CVE-2025-5276
- https://github.com/zcaceres/markdownify-mcp/blob/224cf89f0d58616d2a5522f60f184e8391d1c9e3/src/server.ts#L20C17-L20C29