Auth — 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": "@expensebot/mcp-server-auth",
"source": {
"kind": "package",
"origin": "@expensebot/mcp-server-auth"
},
"server": {
"name": "@expensebot/mcp-server-auth"
}
},
"grade": "A",
"score": {
"score": 93,
"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": "high",
"label": "capability blast radius (high) — client exposure if the model is manipulated",
"appliedPenalty": 6
},
{
"kind": "client",
"term": "verification-discount",
"level": "repo",
"label": "publisher verification (public source) — no provenance, but the source is public and inspectable",
"appliedPenalty": 1
},
{
"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": "high",
"reasons": [
"ingests untrusted external content (a prompt-injection entry point)",
"can execute shell commands or code"
],
"tags": [
"untrusted-input",
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (56 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 server code (src/test.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/test.js:17`): 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": "src/test.js"
},
"evidence": "rt { spawn } from \"node:child_process\"; import { readFileSync } from \"node:fs\"; import { fileURLToPath } from \"node:url\"",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/test.js",
"line": 17,
"nonRuntime": false
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "search_expenses",
"tags": [],
"reasons": {}
},
{
"tool": "get_spending_summary",
"tags": [],
"reasons": {}
},
{
"tool": "get_deep_analytics",
"tags": [],
"reasons": {}
},
{
"tool": "create_report",
"tags": [],
"reasons": {}
},
{
"tool": "list_reports",
"tags": [],
"reasons": {}
},
{
"tool": "request_accounting_integration",
"tags": [],
"reasons": {}
},
{
"tool": "get_report_details",
"tags": [],
"reasons": {}
},
{
"tool": "share_report",
"tags": [],
"reasons": {}
},
{
"tool": "check_compliance",
"tags": [],
"reasons": {}
},
{
"tool": "fix_compliance",
"tags": [],
"reasons": {}
},
{
"tool": "check_tax_deductibility",
"tags": [],
"reasons": {}
},
{
"tool": "search_knowledge",
"tags": [],
"reasons": {}
},
{
"tool": "submit_receipt",
"tags": [],
"reasons": {}
},
{
"tool": "get_last_receipt_result",
"tags": [],
"reasons": {}
},
{
"tool": "add_cash_expense",
"tags": [],
"reasons": {}
},
{
"tool": "parse_expense",
"tags": [],
"reasons": {}
},
{
"tool": "process_gmail_receipts",
"tags": [],
"reasons": {}
},
{
"tool": "scan_gmail",
"tags": [],
"reasons": {}
},
{
"tool": "get_signup_link",
"tags": [],
"reasons": {}
},
{
"tool": "add_mileage_entry",
"tags": [],
"reasons": {}
},
{
"tool": "add_income",
"tags": [],
"reasons": {}
},
{
"tool": "add_income_from_file",
"tags": [],
"reasons": {}
},
{
"tool": "add_income_from_csv",
"tags": [],
"reasons": {}
},
{
"tool": "get_accounting_integration_status",
"tags": [],
"reasons": {}
},
{
"tool": "send_report_to_accounting",
"tags": [],
"reasons": {}
},
{
"tool": "get_accounting_push_status",
"tags": [],
"reasons": {}
},
{
"tool": "list_categories",
"tags": [],
"reasons": {}
},
{
"tool": "list_tags",
"tags": [],
"reasons": {}
},
{
"tool": "get_income_summary",
"tags": [],
"reasons": {}
},
{
"tool": "get_pnl",
"tags": [],
"reasons": {}
},
{
"tool": "get_per_tag_pnl",
"tags": [],
"reasons": {}
},
{
"tool": "list_income_categories",
"tags": [],
"reasons": {}
},
{
"tool": "get_recent_activity",
"tags": [],
"reasons": {}
},
{
"tool": "trace_document",
"tags": [],
"reasons": {}
},
{
"tool": "get_mileage_summary",
"tags": [],
"reasons": {}
},
{
"tool": "get_subscription_audit",
"tags": [],
"reasons": {}
},
{
"tool": "get_expense_by_id",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "export_report",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "get_spreadsheet_url",
"tags": [],
"reasons": {}
},
{
"tool": "get_pricing",
"tags": [],
"reasons": {}
},
{
"tool": "check_feature",
"tags": [],
"reasons": {}
},
{
"tool": "start_trial_link",
"tags": [],
"reasons": {}
},
{
"tool": "whatif_afford",
"tags": [],
"reasons": {}
},
{
"tool": "whatif_client",
"tags": [],
"reasons": {}
},
{
"tool": "whatif_tax_setaside",
"tags": [],
"reasons": {}
},
{
"tool": "scan_gmail_years",
"tags": [],
"reasons": {}
},
{
"tool": "get_scan_status",
"tags": [],
"reasons": {}
},
{
"tool": "list_client_invoices",
"tags": [],
"reasons": {}
},
{
"tool": "get_expense_splits",
"tags": [],
"reasons": {}
},
{
"tool": "get_monthly_books_review",
"tags": [],
"reasons": {}
},
{
"tool": "get_credits_refunds",
"tags": [],
"reasons": {}
},
{
"tool": "get_client_advance_balances",
"tags": [],
"reasons": {}
},
{
"tool": "get_trip_suggestions",
"tags": [],
"reasons": {}
},
{
"tool": "group_expenses",
"tags": [],
"reasons": {}
},
{
"tool": "update_expense",
"tags": [],
"reasons": {}
},
{
"tool": "correct_expenses",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "9806a47d3621456bd12f2451bcfc9d50e9b09784b557266ae93b3bc3529ef663",
"stats": {
"tools": 56,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 1,
"medium": 0,
"low": 0,
"info": 0
}
}
}