Mattermost — the complete, unedited output of the deterministic mcptrustchecker engine v1.13.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.13.0",
"methodologyVersion": "mcptrustchecker-1.13"
},
"target": {
"id": "mattermost-mcp",
"source": {
"kind": "package",
"origin": "mattermost-mcp"
},
"server": {
"name": "mattermost-mcp"
}
},
"grade": "A",
"score": {
"score": 98,
"threatScore": 100,
"grade": "A",
"band": "A",
"categorySubtotals": {
"injection": 0,
"exfiltration": 0,
"permissions": 0,
"supply-chain": 0,
"network": 0,
"hygiene": 0
},
"vector": [
{
"kind": "client",
"term": "capability-exposure",
"level": "minimal",
"label": "capability blast radius (minimal) — client exposure if the model is manipulated",
"appliedPenalty": 0
},
{
"kind": "client",
"term": "verification-discount",
"level": "none",
"label": "publisher verification (unlinked) — no provenance/repo link, but the shipped source was fully read",
"appliedPenalty": 2
},
{
"kind": "client",
"term": "coverage-honesty",
"level": "source",
"label": "inspection depth (source) — how much of the target the scan could see",
"appliedPenalty": 0
}
],
"gatesFired": [],
"methodologyVersion": "mcptrustchecker-1.13"
},
"capability": {
"level": "minimal",
"reasons": [],
"tags": []
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (53 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command \"npx -y <package>\"."
]
},
"findings": [
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in packaging/dev tooling (scripts/security_sanitizer.py)",
"category": "permissions",
"severity": "low",
"confidence": "heuristic",
"description": "In a packaging/dev/install script (shipped, but not the server runtime) (`scripts/security_sanitizer.py:136`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": "scripts/security_sanitizer.py"
},
"evidence": "try: result = subprocess.run( [\"git\", \"ls-files\", \"--cached\", \"--others\", \"--exclude-standard\"],",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "scripts/security_sanitizer.py",
"line": 136,
"nonRuntime": true
}
},
{
"ruleId": "MTC-SUP-011",
"title": "Package declares no source repository",
"category": "supply-chain",
"severity": "info",
"confidence": "strong",
"description": "\"mattermost-mcp\" declares no repository URL, so its published artifact cannot be compared against reviewable source.",
"remediation": "Prefer packages that link to public, reviewable source.",
"location": {
"kind": "package",
"name": "mattermost-mcp"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "mattermost_mcp_access_control",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_actions",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_agents",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_audit_logging",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_boards",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_bookmarks",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_bots",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_brand",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_channels",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_cloud",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_cluster",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_commands",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_compliance",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_content_flagging",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_custom_profile_attributes",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_dataretention",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_elasticsearch",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_emoji",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_exports",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_files",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_groups",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_imports",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_ip_filters",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_jobs",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_ldap",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_limits",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_logs",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_metrics",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_oauth",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_outgoing_oauth_connections",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_permissions",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_plugins",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_posts",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_preferences",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_properties",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_reactions",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_recaps",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_remoteclusters",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_reports",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_roles",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_saml",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_scheduled_post",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_schemes",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_service_terms",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_sharedchannels",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_status",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_system",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_teams",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_uploads",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_usage",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_users",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_views",
"tags": [],
"reasons": {}
},
{
"tool": "mattermost_mcp_webhooks",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "4cc1ff559cd7cba66b02ca7a1a5075fe50b2649e6e6f9f5d12eaadb9cbd45614",
"stats": {
"tools": 53,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 0,
"low": 1,
"info": 1
}
}
}