Vikunja Fastmcp — 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": "vikunja-fastmcp",
"source": {
"kind": "package",
"origin": "vikunja-fastmcp"
},
"server": {
"name": "vikunja-fastmcp"
}
},
"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 send data / act on an external service",
"reads sensitive or local data",
"has a read → egress path (a data-exfiltration surface)",
"untrusted-input, sensitive-source and egress co-exist across tools (toxic-flow surface)"
],
"tags": [
"untrusted-input",
"external-sink",
"sensitive-source"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (23 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: vikunja_download_user_export → vikunja_webhooks. 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": "vikunja_download_user_export → vikunja_webhooks"
},
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"untrusted": [
"vikunja_download_user_export"
],
"sources": [
"vikunja_webhooks"
],
"sinks": [
"vikunja_webhooks"
],
"path": [
"vikunja_download_user_export",
"vikunja_webhooks"
],
"edges": [
{
"from": "vikunja_download_user_export",
"to": "vikunja_webhooks",
"kind": "agent-mediated"
}
],
"wired": false
}
},
{
"ruleId": "MTC-FLOW-003",
"title": "Read-and-egress in one tool: \"vikunja_webhooks\"",
"category": "exfiltration",
"severity": "high",
"confidence": "strong",
"description": "Tool \"vikunja_webhooks\" can both read sensitive data and send data to an external destination. Even without an explicit untrusted-input leg, this is a single-call data-exfiltration path if the model is ever manipulated.",
"remediation": "Separate reading from sending; require explicit user confirmation before egress of file/secret contents.",
"location": {
"kind": "flow",
"name": "vikunja_webhooks"
},
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"tags": [
"external-sink",
"sensitive-source"
]
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "critical",
"confidence": "strong",
"untrustedInput": [
"vikunja_download_user_export"
],
"sensitiveSource": [
"vikunja_webhooks"
],
"externalSink": [
"vikunja_webhooks"
],
"selfContained": false,
"path": [
"vikunja_download_user_export",
"vikunja_webhooks"
],
"pathWired": false,
"description": "A cross-tool exfiltration chain exists: vikunja_download_user_export → vikunja_webhooks."
},
{
"id": "flow-2",
"severity": "high",
"confidence": "strong",
"untrustedInput": [],
"sensitiveSource": [
"vikunja_webhooks"
],
"externalSink": [
"vikunja_webhooks"
],
"selfContained": true,
"description": "Tool \"vikunja_webhooks\" both reads sensitive data and can send it externally."
}
],
"capabilities": [
{
"tool": "self_check",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_auth",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_projects",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_tasks",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_task_attachments",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_task_comments",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_labels",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_users",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_admin_users",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_notifications",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_account_email",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_external_migration",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_teams",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_filters",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_task_bulk",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_task_reminders",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_batch_import",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_export_project",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_project_migration",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_request_user_export",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_download_user_export",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"download\""
]
}
},
{
"tool": "vikunja_templates",
"tags": [],
"reasons": {}
},
{
"tool": "vikunja_webhooks",
"tags": [
"external-sink",
"sensitive-source"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
],
"sensitive-source": [
"parameter \"secret\""
]
}
}
],
"surfaceDigest": "66e9e9d6f130599c78cb685d1c8b9c884cff1645903f2d9332403fb137e298f9",
"stats": {
"tools": 23,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 1,
"high": 1,
"medium": 0,
"low": 0,
"info": 0
}
}
}