Webasyst — 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": "webasyst-mcp-server",
"source": {
"kind": "package",
"origin": "webasyst-mcp-server"
},
"server": {
"name": "webasyst-mcp-server"
}
},
"grade": "B",
"score": {
"score": 87,
"threatScore": 94,
"grade": "B",
"band": "B",
"categorySubtotals": {
"injection": 6.3,
"exfiltration": 0,
"permissions": 0,
"supply-chain": 0,
"network": 0,
"hygiene": 0
},
"vector": [
{
"kind": "threat",
"ruleId": "MTC-SRC-009",
"category": "injection",
"severity": "medium",
"confidence": "strong",
"rawWeight": 9,
"confidenceMult": 0.7,
"diminishingFactor": 1,
"appliedPenalty": 6.3
},
{
"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": [
"can execute shell commands or code"
],
"tags": [
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (38 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-CAP-001",
"title": "Tool \"run_webasyst_cli\" exposes command/code execution",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "Tool \"run_webasyst_cli\" 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": "run_webasyst_cli"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"tags": [
"code-exec"
]
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (webasyst-mcp.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`webasyst-mcp.js:16`): 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": "webasyst-mcp.js"
},
"evidence": "spawn, execSync } from 'child_process'; // ========= Utils ========= const toCamelCase = (s) => s.replace(/[-_](.)/g, (",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "webasyst-mcp.js",
"line": 16,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-009",
"title": "Untrusted input concatenated into a command sink (webasyst-mcp.js)",
"category": "injection",
"severity": "medium",
"confidence": "strong",
"description": "In the server's implementation (`webasyst-mcp.js:1319`): A shell/process command assembled from concatenated or interpolated values is command injection when any part is attacker-influenced — the OWASP canonical RCE flow. Verify what reaches the interpolated value. 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": "webasyst-mcp.js"
},
"evidence": "уйте шаблон'); try { execSync(`msgfmt \"${poPath}\" -o \"${moPath}\"`); return { content: [{ type: 'text', text: `MO ск",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-009",
"file": "webasyst-mcp.js",
"line": 1319,
"nonRuntime": false
}
},
{
"ruleId": "MTC-CAP-006",
"title": "Unconstrained command parameter \"command\" on \"run_webasyst_cli\"",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"run_webasyst_cli\" 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": "run_webasyst_cli",
"field": "inputSchema.properties.command"
},
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"param": "command"
}
},
{
"ruleId": "MTC-CAP-005",
"title": "Mutating tool \"run_webasyst_cli\" declares no destructiveHint",
"category": "hygiene",
"severity": "low",
"confidence": "heuristic",
"description": "Tool \"run_webasyst_cli\" 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": "run_webasyst_cli"
},
"data": {
"tags": [
"code-exec"
]
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "list_webasyst_apps",
"tags": [],
"reasons": {}
},
{
"tool": "get_app_info",
"tags": [],
"reasons": {}
},
{
"tool": "list_app_plugins",
"tags": [],
"reasons": {}
},
{
"tool": "get_plugin_info",
"tags": [],
"reasons": {}
},
{
"tool": "list_app_themes",
"tags": [],
"reasons": {}
},
{
"tool": "list_app_widgets",
"tags": [],
"reasons": {}
},
{
"tool": "get_routing_config",
"tags": [],
"reasons": {}
},
{
"tool": "get_system_config",
"tags": [],
"reasons": {}
},
{
"tool": "run_webasyst_cli",
"tags": [
"code-exec"
],
"reasons": {
"code-exec": [
"parameter \"command\""
]
}
},
{
"tool": "create_app_structure",
"tags": [],
"reasons": {}
},
{
"tool": "create_plugin_structure",
"tags": [],
"reasons": {}
},
{
"tool": "create_widget",
"tags": [],
"reasons": {}
},
{
"tool": "create_action",
"tags": [],
"reasons": {}
},
{
"tool": "create_model",
"tags": [],
"reasons": {}
},
{
"tool": "create_theme",
"tags": [],
"reasons": {}
},
{
"tool": "create_site_plugin",
"tags": [],
"reasons": {}
},
{
"tool": "create_site_widget",
"tags": [],
"reasons": {}
},
{
"tool": "create_site_block",
"tags": [],
"reasons": {}
},
{
"tool": "create_site_theme",
"tags": [],
"reasons": {}
},
{
"tool": "create_shop_plugin",
"tags": [],
"reasons": {}
},
{
"tool": "create_shop_theme",
"tags": [],
"reasons": {}
},
{
"tool": "create_shipping_plugin",
"tags": [],
"reasons": {}
},
{
"tool": "create_payment_plugin",
"tags": [],
"reasons": {}
},
{
"tool": "create_shop_report",
"tags": [],
"reasons": {}
},
{
"tool": "create_generic_app",
"tags": [],
"reasons": {}
},
{
"tool": "enable_webasyst_ui",
"tags": [],
"reasons": {}
},
{
"tool": "create_ui_component",
"tags": [],
"reasons": {}
},
{
"tool": "setup_seo_optimization",
"tags": [],
"reasons": {}
},
{
"tool": "analyze_project",
"tags": [],
"reasons": {}
},
{
"tool": "generate_po_template",
"tags": [],
"reasons": {}
},
{
"tool": "compile_mo",
"tags": [],
"reasons": {}
},
{
"tool": "check_project_compliance",
"tags": [],
"reasons": {}
},
{
"tool": "prepare_release_bundle",
"tags": [],
"reasons": {}
},
{
"tool": "generate_nginx_vhost",
"tags": [],
"reasons": {}
},
{
"tool": "generate_htaccess",
"tags": [],
"reasons": {}
},
{
"tool": "validate_ui_usage",
"tags": [],
"reasons": {}
},
{
"tool": "generate_color_scheme",
"tags": [],
"reasons": {}
},
{
"tool": "create_responsive_layout",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "da6d757b3d4728b3e3df99e7c5a825f5166bda577e06fa4cf4505f1900c31828",
"stats": {
"tools": 38,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 2,
"medium": 2,
"low": 1,
"info": 0
}
}
}