MCP Observatory
github analyzed 9a93dc8

cyanheads/mailchimp-mcp-server

github

Draft, test, and send Mailchimp campaigns straight from your MCP client — with audience management, subscriber CRUD, and post-send analytics behind safe-by-default send gates. STDIO or Streamable HTTP.

maintainer
cyanheads
license
Apache-2.0
first seen
2026-06-12
last seen
2026-06-16
releases · 30d
3
short id
risk 56/100 · heuristic grade
C elevated
  • capability exposureinferred+22
  • recent driftinferred+12
  • tool safetyinferred+25
  • trust mitigatorsmixed−3

inferredmixed

The A–E grade is our heuristic synthesis — a "review this" prompt, not a verdict. Each factor is tagged by what backs it: attested (a verifiable record), reported (a third party's claim), or inferred (our own heuristic, e.g. permissions). See methodology.

graded 16m ago · see ecosystem CVEs →

risk trajectory 1 movements
  • C · 35 → C · 56
capability exposure grade factor +22
Inferred surface — each links to servers holding it:
vulnerabilities 0 CVEs

No known CVEs for this server.

tool safety 3 findings · grade factor +25
  1. highexfiltration combomailchimp_files

    single tool reads + sends: fs, net

  2. highhidden prompt content

    1 file(s) with hidden prompt content: cyanheads-mailchimp-mcp-server-9a93dc8/CLAUDE.md (skill-exfil): "secret→sink: return { ...raw, dataCenter: dc, baseUrl: raw.baseUrl ?? `https…

  3. hightoxic flow (lethal trifecta)

    lethal trifecta reachable across this server's tools: private-data access + untrusted-content ingestion + network exfil

skills & danger signals github-tarball
prompt-surface shipped agent-instruction files + hidden-content / dangerous-code findings — quoted from the analyzed source

analyzed commit 9a93dc8 · analyzer v18 · 1h ago

skills & prompt files 33

other grade factors evidence elsewhere
embed badge readme-ready
live risk-grade badge preview [![MCP Observatory risk grade](https://mcpobservatory.com/servers/github:cyanheads/mailchimp-mcp-server/badge.svg)](https://mcpobservatory.com/servers/github:cyanheads/mailchimp-mcp-server/security)

Heuristic, inferred signals — false positives (legitimately powerful tools, forks, language ports) are expected. Treat each as "review this", not a verdict. See the ecosystem-wide picture on the security hub, or the fleet security of cyanheads.