Slack is a channel-based messaging platform. With Slack, people can work together more effectively, connect all their software tools and services, and find the information they need to do their best work — all within a secure, enterprise-grade environment.
Source not yet analyzed — this grade rests on attested signals (CVEs, supply-chain) only. It is a floor: reading the code could raise it, not lower it.
- capability exposure inferred + 35
- tool safety inferred + 25
- trust mitigators mixed − 8
inferred mixed
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 2m ago · see ecosystem CVEs →
- C · 57 → C · 52
- D · 62 → C · 57
- C · 57 → D · 62
- C · 52 → C · 57
No known CVEs for this server.
- medium exfiltration combo SLACK_ADD_A_REMOTE_FILE_FROM_A_SERVICE
single tool reads + sends: fs, net
- medium exfiltration combo SLACK_ENABLE_PUBLIC_SHARING_OF_A_FILE
single tool reads + sends: fs, net
- medium exfiltration combo SLACK_LIST_CANVASES
single tool reads + sends: fs, net
- medium exfiltration combo SLACK_REMOVE_A_REMOTE_FILE
single tool reads + sends: fs, net
- medium exfiltration combo SLACK_REVOKE_PUBLIC_SHARING_ACCESS_FOR_A_FILE
single tool reads + sends: fs, net
- medium exfiltration combo SLACK_UPDATES_AN_EXISTING_REMOTE_FILE
single tool reads + sends: fs, net
- medium toxic flow (lethal trifecta)
lethal trifecta reachable across this server's tools: private-data access + untrusted-content ingestion + network exfil
- low exfiltration combo SLACK_CUSTOMIZE_URL_UNFURL
single tool reads + sends: net, secrets
- low exfiltration combo SLACK_CUSTOMIZE_URL_UNFURLING_IN_MESSAGES
single tool reads + sends: net, secrets
- low exfiltration combo SLACK_FIND_USERS
single tool reads + sends: net, db
- low exfiltration combo SLACK_RETRIEVE_A_USER_S_IDENTITY_DETAILS
single tool reads + sends: net, secrets
[](https://mcpobservatory.com/servers/smithery:slack/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 slack.