Proxmox — 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": "proxmox-mcp",
"source": {
"kind": "package",
"origin": "proxmox-mcp"
},
"server": {
"name": "proxmox-mcp"
}
},
"grade": "A",
"score": {
"score": 90,
"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": "critical",
"label": "capability blast radius (critical) — client exposure if the model is manipulated",
"appliedPenalty": 10
},
{
"kind": "client",
"term": "verification-discount",
"level": "source",
"label": "publisher verification (provenance) — cryptographic build provenance ties the artifact to its source",
"appliedPenalty": 0
},
{
"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": "critical",
"reasons": [
"ingests untrusted external content (a prompt-injection entry point)",
"reads sensitive or local data",
"has a read → egress path (a data-exfiltration surface)",
"can execute shell commands or code",
"untrusted-input, sensitive-source and egress co-exist across tools (toxic-flow surface)",
"untrusted input can reach code execution"
],
"tags": [
"code-exec",
"untrusted-input",
"sensitive-source"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (58 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-FLOW-002",
"title": "Completed toxic-flow trifecta across tools",
"category": "exfiltration",
"severity": "critical",
"confidence": "strong",
"description": "This server (without client built-ins) exposes a complete data-exfiltration chain: proxmox_storage_download_url → proxmox_vm_cloud_init_dump → proxmox_node_terminal_run. Untrusted input is ingested, private data is read, and it can be sent to an external sink via the agent composing the tools (→). Static analysis proves the primitive exists, not that a specific run will occur.",
"remediation": "Remove one leg of the trifecta: isolate untrusted-input tools from secret-reading tools and from egress tools, or require human approval between them.",
"location": {
"kind": "flow",
"name": "proxmox_storage_download_url → proxmox_vm_cloud_init_dump → proxmox_node_terminal_run"
},
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"untrusted": [
"proxmox_storage_download_url"
],
"sources": [
"proxmox_vm_cloud_init_dump"
],
"sinks": [
"proxmox_shell_run",
"proxmox_node_terminal_run",
"proxmox_vm_guest_exec"
],
"path": [
"proxmox_storage_download_url",
"proxmox_vm_cloud_init_dump",
"proxmox_node_terminal_run"
],
"edges": [
{
"from": "proxmox_storage_download_url",
"to": "proxmox_vm_cloud_init_dump",
"kind": "agent-mediated"
},
{
"from": "proxmox_vm_cloud_init_dump",
"to": "proxmox_node_terminal_run",
"kind": "agent-mediated"
}
],
"wired": false
}
},
{
"ruleId": "MTC-CAP-001",
"title": "Tool \"proxmox_shell_run\" exposes command/code execution",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "Tool \"proxmox_shell_run\" appears to run shell commands or evaluate code (keyword \"shell\" in tool name, parameter \"command\"). Arbitrary execution driven by model input is one of the most dangerous MCP capabilities; combined with any untrusted input it becomes RCE.",
"remediation": "Sandbox execution, allowlist commands/arguments, and never pass model output to a shell unescaped.",
"location": {
"kind": "tool",
"name": "proxmox_shell_run"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-CAP-001",
"title": "Tool \"proxmox_node_terminal_run\" exposes command/code execution",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "Tool \"proxmox_node_terminal_run\" appears to run shell commands or evaluate code (parameter \"command\"). Arbitrary execution driven by model input is one of the most dangerous MCP capabilities; combined with any untrusted input it becomes RCE.",
"remediation": "Sandbox execution, allowlist commands/arguments, and never pass model output to a shell unescaped.",
"location": {
"kind": "tool",
"name": "proxmox_node_terminal_run"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-CAP-001",
"title": "Tool \"proxmox_vm_guest_exec\" exposes command/code execution",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "Tool \"proxmox_vm_guest_exec\" appears to run shell commands or evaluate code (keyword \"exec\" in tool name, parameter \"command\"). Arbitrary execution driven by model input is one of the most dangerous MCP capabilities; combined with any untrusted input it becomes RCE.",
"remediation": "Sandbox execution, allowlist commands/arguments, and never pass model output to a shell unescaped.",
"location": {
"kind": "tool",
"name": "proxmox_vm_guest_exec"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-SRC-001",
"title": "Dynamic code execution in server code (dist/schema.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`dist/schema.js:91`): Evaluating strings as code is the most direct RCE primitive; if any tool input reaches it, the server executes attacker-chosen code. 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": "dist/schema.js"
},
"evidence": "t sandbox = {}; vm.runInNewContext(`${raw}\\nthis.apiSchema = apiSchema;`, sandbox); const roots = sandbo",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-001",
"file": "dist/schema.js",
"line": 91,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (dist/ssh.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`dist/ssh.js:3`): 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": "dist/ssh.js"
},
"evidence": "rt { spawn } from \"node:child_process\"; import { Client } from \"ssh2\"; import { shellJoin } from \"./utils.js\"; /** Verif",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "dist/ssh.js",
"line": 3,
"nonRuntime": false
}
},
{
"ruleId": "MTC-CAP-007",
"title": "Unconstrained URL/host parameter \"url\" on \"proxmox_storage_download_url\"",
"category": "network",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"proxmox_storage_download_url\" takes a URL/host parameter \"url\" with no allowlist/pattern. An outbound-request tool with an unbounded destination enables SSRF and cloud-metadata access (e.g. 169.254.169.254).",
"remediation": "Allowlist destinations or constrain the parameter; block private/link-local addresses server-side.",
"location": {
"kind": "tool",
"name": "proxmox_storage_download_url",
"field": "inputSchema.properties.url"
},
"owasp": "LLM06:2025 Excessive Agency",
"data": {
"param": "url"
}
},
{
"ruleId": "MTC-CAP-006",
"title": "Unconstrained command parameter \"command\" on \"proxmox_shell_run\"",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"proxmox_shell_run\" takes a command-shaped parameter \"command\" with no enum/pattern constraint. Free-form, model- or attacker-controlled arguments reaching a shell is the command-injection precondition.",
"remediation": "Constrain the parameter (enum/pattern), or build the command from a fixed template with escaped args.",
"location": {
"kind": "tool",
"name": "proxmox_shell_run",
"field": "inputSchema.properties.command"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"param": "command"
}
},
{
"ruleId": "MTC-CAP-006",
"title": "Unconstrained command parameter \"command\" on \"proxmox_node_terminal_run\"",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"proxmox_node_terminal_run\" takes a command-shaped parameter \"command\" with no enum/pattern constraint. Free-form, model- or attacker-controlled arguments reaching a shell is the command-injection precondition.",
"remediation": "Constrain the parameter (enum/pattern), or build the command from a fixed template with escaped args.",
"location": {
"kind": "tool",
"name": "proxmox_node_terminal_run",
"field": "inputSchema.properties.command"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"param": "command"
}
},
{
"ruleId": "MTC-CAP-006",
"title": "Unconstrained command parameter \"command\" on \"proxmox_vm_guest_exec\"",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"proxmox_vm_guest_exec\" takes a command-shaped parameter \"command\" with no enum/pattern constraint. Free-form, model- or attacker-controlled arguments reaching a shell is the command-injection precondition.",
"remediation": "Constrain the parameter (enum/pattern), or build the command from a fixed template with escaped args.",
"location": {
"kind": "tool",
"name": "proxmox_vm_guest_exec",
"field": "inputSchema.properties.command"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"param": "command"
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"proxmox_shell_run\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"proxmox_shell_run\" can mutate/egress but declares no destructiveHint. Clients that don't default to spec-safe behavior may not prompt before running it.",
"remediation": "Declare accurate annotations, and gate destructive tools on user confirmation regardless.",
"location": {
"kind": "tool",
"name": "proxmox_shell_run"
},
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"proxmox_node_terminal_run\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"proxmox_node_terminal_run\" can mutate/egress but declares no destructiveHint. Clients that don't default to spec-safe behavior may not prompt before running it.",
"remediation": "Declare accurate annotations, and gate destructive tools on user confirmation regardless.",
"location": {
"kind": "tool",
"name": "proxmox_node_terminal_run"
},
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"proxmox_vm_guest_exec\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"proxmox_vm_guest_exec\" can mutate/egress but declares no destructiveHint. Clients that don't default to spec-safe behavior may not prompt before running it.",
"remediation": "Declare accurate annotations, and gate destructive tools on user confirmation regardless.",
"location": {
"kind": "tool",
"name": "proxmox_vm_guest_exec"
},
"data": {
"tags": [
"code-exec"
]
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "critical",
"confidence": "strong",
"untrustedInput": [
"proxmox_storage_download_url"
],
"sensitiveSource": [
"proxmox_vm_cloud_init_dump"
],
"externalSink": [
"proxmox_shell_run",
"proxmox_node_terminal_run",
"proxmox_vm_guest_exec"
],
"selfContained": false,
"path": [
"proxmox_storage_download_url",
"proxmox_vm_cloud_init_dump",
"proxmox_node_terminal_run"
],
"pathWired": false,
"description": "A cross-tool exfiltration chain exists: proxmox_storage_download_url → proxmox_vm_cloud_init_dump → proxmox_node_terminal_run."
}
],
"capabilities": [
{
"tool": "proxmox_user_list",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_boot_diagnose",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_inventory_overview",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_cluster_status",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_pci_mapping_list",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_pci_mapping_get",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_pci_mapping_create",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_pci_mapping_update",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_pci_mapping_delete",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_api_call",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_cli_run",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_shell_run",
"tags": [
"code-exec"
],
"reasons": {
"code-exec": [
"keyword \"shell\" in tool name",
"parameter \"command\""
]
}
},
{
"tool": "proxmox_file_read",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_file_write",
"tags": [],
"reasons": {}
},
{
"tool": "job_get",
"tags": [],
"reasons": {}
},
{
"tool": "job_wait",
"tags": [],
"reasons": {}
},
{
"tool": "job_cancel",
"tags": [],
"reasons": {}
},
{
"tool": "job_logs",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_bootstrap_node_access",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_capabilities",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_firewall_get",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_backup_jobs",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_backup_start",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_ceph_status",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_sdn_list",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_task_list",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_task_get",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_console_ticket",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_lxc_list",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_lxc_get",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_lxc_action",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_node_list",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_node_get",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_node_action",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_network_list",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_node_terminal_run",
"tags": [
"code-exec"
],
"reasons": {
"code-exec": [
"parameter \"command\""
]
}
},
{
"tool": "proxmox_vm_list",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_get",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_guest_agent_diagnose",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_agent_ping",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_agent_info",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_action",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_guest_exec",
"tags": [
"code-exec"
],
"reasons": {
"code-exec": [
"keyword \"exec\" in tool name",
"parameter \"command\""
]
}
},
{
"tool": "proxmox_vm_template_list",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_template_get",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_create",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_update_config",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_convert_to_template",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_clone",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_destroy",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_storage_list",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_storage_get",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_storage_download_url",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "proxmox_cloud_init_snippet_list",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_cloud_init_snippet_get",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_cloud_init_snippet_put",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_cloud_init_snippet_delete",
"tags": [],
"reasons": {}
},
{
"tool": "proxmox_vm_cloud_init_dump",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"dump\""
]
}
}
],
"surfaceDigest": "848371255b241bfd36943fc41552004f9fdb63abb09edfd6bb07f1d86580dc80",
"stats": {
"tools": 58,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 1,
"high": 5,
"medium": 4,
"low": 3,
"info": 0
}
}
}