hackmd-mcp server-side request forgery in HTTP transport mode
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| yuna0x0 | hackmd-mcp | affected |
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| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2025-29214 | HackMD MCP Server has Server-Side Request Forgery (SSRF) vulnerability |
Github GHSA |
GHSA-g5cg-6c7v-mmpw | HackMD MCP Server has Server-Side Request Forgery (SSRF) vulnerability |
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.356% probability within 30 days)
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ssvc
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| Description | hackmd-mcp is a Model Context Protocol server for integrating HackMD's note-taking platform with AI assistants. From 1.4.0 to before 1.5.0, hackmd-mcp contains a server-side request forgery (SSRF) vulnerability when the server is run in HTTP transport mode. Arbitrary hackmdApiUrl values supplied via the Hackmd-Api-Url HTTP header or a base64-encoded JSON query parameter are accepted without validation, allowing attackers to redirect outbound API requests to internal network services, access internal endpoints, perform network reconnaissance, and bypass network access controls. The stdio transport mode is not affected because it only accepts stdio requests. The issue is fixed in version 1.5.0, which enforces allowed endpoints and supports the ALLOWED_HACKMD_API_URLS environment variable. Users should update to 1.5.0 or later or apply documented mitigations such as switching to stdio mode, restricting outbound network access, or filtering the Hackmd-Api-Url header and related query parameter via a reverse proxy. | |
| Title | hackmd-mcp server-side request forgery in HTTP transport mode | |
| Weaknesses | CWE-918 | |
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| Metrics |
cvssV4_0
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Server-Side Request Forgery (SSRF)