Skills/PyPI/mcp-server-mattermost

mcp-server-mattermost@0.6.1

CAUTION· not started

Publisher claims: "MCP server for Mattermost integration" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher cloud-ru-tech · publishing for 282 daysInstalls 5,113Last detonated 5d ago
What would fix thisWatchDispute verdict

Coverage

Not started: dependency install failed; the server itself was not observed.
Tested
the dependency install step · every file read, file written and host contacted by what ran
Not tested
server startup · the tool list · tool behavior

What this means for the label: Caution here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.

Before you give it your token

It will ask for
no credential variables read in the code
Where it talks to
no vendor host named in the code
What the honeypot saw
no credential files read · no network
What we could not test
server startup · the tool list · tool behavior

Connect it under the guard. Not started: dependency install failed; the server itself was not observed. The code names no credential variable; the guard pins the network to what the honeypot saw and logs every call.

$vet-skills run --net declared -- uvx mcp-server-mattermost

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; not started: dependency install failed; the server itself was not observed) on 2026-11-09 and scored it 77/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Access to sensitive file paths; Collapsed <details> block carrying instructions. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 0 s · 2 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.2sprocessdependency install exit 1 ·
0.2sclaimednot started: dependency install failed (exit 1); the server itself was not observed
0.2sprocessscript backend runs setup only
0.2sprocessno install scripts to re-run

Static findings

HIGH
Access to sensitive file pathssrc/mcp_server_mattermost/config.py:82 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesenv_file=".env",Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
LOW
Instructs the agent to modify its persistent memory or instruction filesdocs/best-practices.md:33 · Instructs the agent to modify its persistent memory or instruction files · informational: not an instruction fileAdd to `CLAUDE.md` in project root.Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_init.py:89 · MCP server using network transport (SSE/HTTP) — data sent over networkmonkeypatch.setattr(sys, "argv", ["mcp-server-mattermost", "--http", "--port", "9000"])Fix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)AGENTS.md:68 · MCP server using network transport (SSE/HTTP) — data sent over network- `src/mcp_server_mattermost/client.py` - Async HTTP client with retry logicFix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_client.py:164 · MCP server using network transport (SSE/HTTP) — data sent over networkfrom mcp_server_mattermost.client import create_http_clientFix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)src/mcp_server_mattermost/__init__.py:30 · MCP server using network transport (SSE/HTTP) — data sent over networkmcp-server-mattermost --http # HTTP streamingFix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_init.py:72 · MCP server using network transport (SSE/HTTP) — data sent over networkmonkeypatch.setattr(sys, "argv", ["mcp-server-mattermost", "--http"])Fix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_init.py:52 · MCP server using network transport (SSE/HTTP) — data sent over networkmonkeypatch.setattr(sys, "argv", ["mcp-server-mattermost", "--http"])Fix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_client.py:3163 · MCP server using network transport (SSE/HTTP) — data sent over networkfrom mcp_server_mattermost.client import create_http_clientFix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_client.py:3147 · MCP server using network transport (SSE/HTTP) — data sent over networkfrom mcp_server_mattermost.client import create_http_clientFix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_init.py:103 · MCP server using network transport (SSE/HTTP) — data sent over networkmonkeypatch.setattr(sys, "argv", ["mcp-server-mattermost", "--http", "--host", "0.0.0.0"]) # noqa: S104Fix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_auth.py:189 · MCP server using network transport (SSE/HTTP) — data sent over networkfrom mcp_server_mattermost import http_poolFix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
HIGH
Collapsed <details> block carrying instructionsREADME.md:200 · Collapsed <details> block carrying instructions<summary>Claude Desktop config</summary> ```json { "mcpServers": { "mattermost": { "command": "docker", "args": [ "run", "-i", "--rm", "-e", "MATTERMOST_URL=httFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
MEDIUM
Destructive file system command detectedDockerfile:33 · Destructive file system command detected&& rm -rf /var/lib/apt/lists/*Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
File permission modification commandDockerfile:39 · File permission modification command — agent changes file ownership/permissions# Non-root user; `-m` creates /home/mcp, the WORKDIR below. Never `chown -RFix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.
AST05
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_init.py:121 · MCP server using network transport (SSE/HTTP) — data sent over networkmonkeypatch.setattr(sys, "argv", ["mcp-server-mattermost", "--http", "--host", host])Fix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)src/mcp_server_mattermost/__init__.py:84 · MCP server using network transport (SSE/HTTP) — data sent over networkfrom mcp_server_mattermost.http_security import ( # noqa: PLC0415Fix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_client.py:180 · MCP server using network transport (SSE/HTTP) — data sent over networkfrom mcp_server_mattermost.client import create_http_clientFix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)src/mcp_server_mattermost/__init__.py:31 · MCP server using network transport (SSE/HTTP) — data sent over networkMCP_TRANSPORT=http mcp-server-mattermost # HTTP via env varFix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_auth.py:219 · MCP server using network transport (SSE/HTTP) — data sent over networkpatch("mcp_server_mattermost.auth.shared_http_client", side_effect=TypeError("bug in code")),Fix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_client.py:209 · MCP server using network transport (SSE/HTTP) — data sent over networkfrom mcp_server_mattermost.client import create_http_clientFix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04

Cost to the agent

Instructions loaded
≈2,493 tok
3 files · 81 in bundle
Tool list per prompt
≈0 tok
0 tools · 0 per tool
Handshake
no reply
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 0

Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.

Known vulnerabilities

No advisories in OSV for mcp-server-mattermost@0.6.1 as of 5d ago. This is the package itself, not its dependencies.

What would make this Verified

3 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Unclaimed publisher≈ +8 on the totalClaim cloud-ru-tech: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  2. Hidden instructions≈ +6 on the totalRemove HTML comments, zero-width characters and white-on-white text that carry instructions. Everything the agent is meant to read should be visible to the person reading the file.
  3. Access to sensitive file paths≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
  4. MCP server using network transport (SSE/HTTP)≈ +2 on the totalNamespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
  5. Destructive file system command detected≈ +2 on the totalBuild commands from fixed arguments; do not interpolate untrusted strings into a shell.
  6. File permission modification command≈ +2 on the totalRequest the narrowest permission that works; replace wildcards with the exact paths or hosts.
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