Is slack-mcp-server safe?
- Node.js shell/command execution
What to do: Nothing here argues against installing it. Grant the capabilities it lists only if you expect the tool to need them.
slack-mcp-server is an npm package analyzed by SkillTotal's deterministic static scanner. The scan found no malicious indicators. It can: shell execution — capabilities are what the code can do, not a verdict on intent. Risk score 0/100 (low).
slack-mcp-server 1.3.0
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Automated static-analysis result. It can contain false positives and false negatives, and is not a claim about the intent of slack-mcp-server's authors. Report a false positive.
Behavioral traits
How this component maps to the CSA agentic threat model. Descriptive — it never affects the risk score.
Findings (1)
The component can run operating-system commands or spawn processes.
const childProcess = require('child_process');Why it matters: Powerful and often legitimate — confirm the commands aren't built from untrusted input.
Fix: Confirm the command and its arguments are fully controlled and not derived from untrusted input; prefer execFile with an argument array.
How attackers abuse these capabilities
Interactive labs on the attack class behind the rules above. They show the technique, not anything found in slack-mcp-server.
The free Claude Code plugin scans each npm, PyPI or MCP package with this report's open-source engine before the install command runs. It runs on your machine and needs no account.
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Scan your own componentHow we determine this: deterministic static analysis (regex + AST), evidence-anchored, no code execution. Methodology →