Bitbucket Server — 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": "bitbucket-server-mcp",
"source": {
"kind": "package",
"origin": "bitbucket-server-mcp"
},
"server": {
"name": "bitbucket-server-mcp"
}
},
"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",
"sensitive-source",
"external-sink"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (66 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: browse_files → list_files → create_pull_request. 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": "browse_files → list_files → create_pull_request"
},
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"references": [],
"data": {
"untrusted": [
"browse_files"
],
"sources": [
"list_files"
],
"sinks": [
"create_pull_request",
"create_pull_request_task"
],
"path": [
"browse_files",
"list_files",
"create_pull_request"
],
"edges": [
{
"from": "browse_files",
"to": "list_files",
"kind": "agent-mediated"
},
{
"from": "list_files",
"to": "create_pull_request",
"kind": "agent-mediated"
}
],
"wired": false
}
},
{
"ruleId": "MTC-SUP-012",
"title": "Package has no license",
"category": "hygiene",
"severity": "info",
"confidence": "strong",
"description": "\"bitbucket-server-mcp\" has no declared license. This is a legal/reuse concern, not a security finding.",
"location": {
"kind": "package",
"name": "bitbucket-server-mcp"
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "critical",
"confidence": "strong",
"untrustedInput": [
"browse_files"
],
"sensitiveSource": [
"list_files"
],
"externalSink": [
"create_pull_request",
"create_pull_request_task"
],
"selfContained": false,
"path": [
"browse_files",
"list_files",
"create_pull_request"
],
"pathWired": false,
"description": "A cross-tool exfiltration chain exists: browse_files → list_files → create_pull_request."
}
],
"capabilities": [
{
"tool": "get_attachment",
"tags": [],
"reasons": {}
},
{
"tool": "get_attachment_metadata",
"tags": [],
"reasons": {}
},
{
"tool": "save_attachment_metadata",
"tags": [],
"reasons": {}
},
{
"tool": "list_branches",
"tags": [],
"reasons": {}
},
{
"tool": "get_default_branch",
"tags": [],
"reasons": {}
},
{
"tool": "create_branch",
"tags": [],
"reasons": {}
},
{
"tool": "list_tags",
"tags": [],
"reasons": {}
},
{
"tool": "list_commits",
"tags": [],
"reasons": {}
},
{
"tool": "get_commit",
"tags": [],
"reasons": {}
},
{
"tool": "get_commit_diff",
"tags": [],
"reasons": {}
},
{
"tool": "get_commit_changes",
"tags": [],
"reasons": {}
},
{
"tool": "delete_branch",
"tags": [],
"reasons": {}
},
{
"tool": "delete_tag",
"tags": [],
"reasons": {}
},
{
"tool": "delete_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "delete_pull_request_comment",
"tags": [],
"reasons": {}
},
{
"tool": "delete_pull_request_task",
"tags": [],
"reasons": {}
},
{
"tool": "delete_attachment",
"tags": [],
"reasons": {}
},
{
"tool": "delete_attachment_metadata",
"tags": [],
"reasons": {}
},
{
"tool": "list_dashboard_pull_requests",
"tags": [],
"reasons": {}
},
{
"tool": "list_inbox_pull_requests",
"tags": [],
"reasons": {}
},
{
"tool": "delete_project",
"tags": [],
"reasons": {}
},
{
"tool": "delete_repository",
"tags": [],
"reasons": {}
},
{
"tool": "browse_files",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"browse\""
]
}
},
{
"tool": "get_file_content",
"tags": [],
"reasons": {}
},
{
"tool": "list_files",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"list_files\""
]
}
},
{
"tool": "list_projects",
"tags": [],
"reasons": {}
},
{
"tool": "get_project",
"tags": [],
"reasons": {}
},
{
"tool": "list_pull_requests",
"tags": [],
"reasons": {}
},
{
"tool": "get_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "create_pull_request",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"create_pull_request\""
]
}
},
{
"tool": "update_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "create_draft_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "publish_draft_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "convert_to_draft",
"tags": [],
"reasons": {}
},
{
"tool": "can_merge_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "merge_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "decline_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "reopen_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "approve_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "unapprove_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "request_changes_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "remove_change_request_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "list_pull_request_participants",
"tags": [],
"reasons": {}
},
{
"tool": "watch_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "unwatch_pull_request",
"tags": [],
"reasons": {}
},
{
"tool": "get_commit_message_suggestion",
"tags": [],
"reasons": {}
},
{
"tool": "get_pull_request_diff",
"tags": [],
"reasons": {}
},
{
"tool": "get_pull_request_diff_stat",
"tags": [],
"reasons": {}
},
{
"tool": "list_pull_request_commits",
"tags": [],
"reasons": {}
},
{
"tool": "get_pull_request_activities",
"tags": [],
"reasons": {}
},
{
"tool": "list_pull_request_comments",
"tags": [],
"reasons": {}
},
{
"tool": "get_pull_request_comment",
"tags": [],
"reasons": {}
},
{
"tool": "add_pull_request_comment",
"tags": [],
"reasons": {}
},
{
"tool": "update_pull_request_comment",
"tags": [],
"reasons": {}
},
{
"tool": "resolve_pull_request_comment",
"tags": [],
"reasons": {}
},
{
"tool": "reopen_pull_request_comment",
"tags": [],
"reasons": {}
},
{
"tool": "list_pull_request_tasks",
"tags": [],
"reasons": {}
},
{
"tool": "create_pull_request_task",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"create_pull_request\""
]
}
},
{
"tool": "get_pull_request_task",
"tags": [],
"reasons": {}
},
{
"tool": "update_pull_request_task",
"tags": [],
"reasons": {}
},
{
"tool": "list_repositories",
"tags": [],
"reasons": {}
},
{
"tool": "get_repository",
"tags": [],
"reasons": {}
},
{
"tool": "create_repository",
"tags": [],
"reasons": {}
},
{
"tool": "search_code",
"tags": [],
"reasons": {}
},
{
"tool": "find_file",
"tags": [],
"reasons": {}
},
{
"tool": "find_user",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "e3c706d19446adfa1033b7d1c3b2aaf97ed9ad67a6c905fda1ef18b38ab7d5b0",
"stats": {
"tools": 66,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 1,
"high": 0,
"medium": 0,
"low": 0,
"info": 1
}
}
}