Onion Search
Anonymous web search and page retrieval through the Tor network with DuckDuckGo integration.
0/100
0Tools
8Findings
0Stars
—Downloads
Mar 24, 2026Last Scanned
Score Breakdown5 categories
Code75
Dependencies100
Config0
Description100
Behavior100
OWASP MCP Top 10 Coverage
MCP10-supply-chainMCP10-supply-chainFail
MCP02-tool-poisoningMCP02-tool-poisoningFail
MCP07-insecure-configMCP07-insecure-configFail
MCP08-dependency-vulnMCP08-dependency-vulnPass
MCP01-prompt-injectionMCP01-prompt-injectionPass
MCP03-command-injectionMCP03-command-injectionFail
MCP04-data-exfiltrationMCP04-data-exfiltrationFail
MCP09-logging-monitoringMCP09-logging-monitoringPass
MCP05-privilege-escalationMCP05-privilege-escalationPass
MCP06-excessive-permissionsMCP06-excessive-permissionsFail
Findings8
3critical
3high
1medium
1low
0informational
criticalC1Command InjectionMCP03-command-injectionAML.T0054
Pattern "subprocess\.Popen\s*\([^)]*shell\s*=\s*True" matched in source_code: "subprocess.Popen(
f'start cmd /k "cd /d "{SCRIPT_DIR}" && "{venv_python}" "{tui_script}""',
shell=True" (at position 6789)
Replace exec()/execSync() with execFile() and pass arguments as an array, never as a string. Validate all inputs against an allowlist before use in any shell context. For subprocess.run, always pass a list and shell=False.
criticalL7Transitive MCP Server DelegationMCP06-excessive-permissionsAML.T0054
Pattern "(?:connect|initialize).*(?:mcp|modelcontextprotocol).*(?:server|endpoint|url)" matched in source_code: "Initialize MCP server" (at position 11774)
MCP servers MUST NOT create client connections to other MCP servers without explicit user disclosure. If delegation is required, declare all downstream servers in the server's capabilities and tool descriptions. Never forward user credentials to sub-servers. Implement a trust boundary between the approved server and any delegated servers. Log all transitive delegations for audit.
criticalQ13MCP Bridge Package Supply Chain AttackMCP10-supply-chainAML.T0054
Pattern "(?:mcp|fastmcp|langchain-mcp|llama-index-mcp)(?:>=|~=|==)?(?!\d)" matched in source_code: "MCP" (at position 68)
MCP bridge packages (mcp-remote, mcp-proxy, @modelcontextprotocol/sdk, fastmcp) are high-value supply chain targets — CVE-2025-6514 (CVSS 9.6) in mcp-remote affected 437,000+ installs. Always pin exact versions (no ^ or ~ ranges). Use lockfiles (package-lock.json, pnpm-lock.yaml, uv.lock). Never run `npx mcp-remote` without version pinning. Verify package integrity with `npm audit` or `pip-audit` before deployment. Reference: CVE-2025-6514, OWASP ASI04.
highK13Unsanitized Tool OutputMCP02-tool-poisoningAML.T0054
Pattern "(?:fetch|axios|requests?\.get|http\.get).*(?:return|respond|result|body|text|data)(?!.*(?:sanitize|escape|encode|strip|validate|parse|extract))" matched in source_code: "fetch_pages: Fetch full page content for search result" (at position 162)
Sanitize all external data before including in tool responses. Implement output encoding that neutralizes prompt injection patterns. Truncate excessively long content. Validate structure before passing database results. Apply the principle: treat all external data as untrusted, even in tool outputs. Required by CoSAI MCP-T4.
highO6Server Fingerprinting via Error ResponsesMCP04-data-exfiltrationAML.T0057
Pattern "(?:return|response|json\.dumps|print).*(?:sys\.(?:version|platform|executable|path)|platform\.(?:system|release|machine|processor|node|version))" matched in source_code: "return sys.platform" (at position 3792)
Never expose process, OS, runtime, or database metadata in tool responses or error messages. Use generic error messages ("An error occurred") for production responses. Remove or disable debug/diagnostic endpoints. If health endpoints are needed, limit them to simple "ok"/"error" status without infrastructure details. Wrap all error handlers with a sanitization layer that strips system information.
highK11Missing Server Integrity VerificationMCP10-supply-chainAML.T0054
Pattern "(?:download|fetch|pull).*(?:server|plugin|tool)(?!.*(?:sha256|sha512|checksum|digest|integrity|hash|verify))" matched in source_code: "fetch_pages workflow instead. NEVER use this tool to fetch links from get_sources. This tool is meant for cases where a URL is provided to you by the user or another tool" (at position 16095)
Implement cryptographic verification for MCP server connections: (1) Pin server TLS certificates or public keys, (2) Verify server tool definition checksums against a known-good manifest, (3) Use package manager integrity checks (npm integrity, pip --require-hashes). The MCP spec recommends but doesn't yet mandate server signing — implement it proactively. Required by ISO 27001 A.8.24 and CoSAI MCP-T6.
mediumK17Missing Timeout or Circuit BreakerMCP07-insecure-configAML.T0054
Pattern "(?:query|execute|find|select|aggregate)\s*\((?!.*(?:timeout|maxTimeMS|statement_timeout|deadline|cancel))" matched in source_code: "query (" (at position 12417)
Add timeouts to ALL external calls: HTTP requests (30s), database queries (10s), subprocess execution (60s), and MCP tool calls (30s). Implement circuit breakers that open after N consecutive failures (e.g., opossum, cockatiel). Use AbortSignal for cancellable operations. Required by EU AI Act Art. 15 and OWASP ASI08.
lowF4MCP Spec Non-ComplianceMCP07-insecure-config
Server fails MCP spec compliance checks: required:server_name; required:server_version; required:protocol_version; recommended:tool_descriptions; recommended:parameter_descriptions
Follow the MCP specification for server metadata. Include server name, version, and protocol version. Provide descriptions for all tools and parameters.
Security Category Deep Dive
Sub-Category Tree · Remediation Roadmap · Attack Stories · Compliance Overlay · ATLAS Techniques · Maturity Model
Prompt Injection
Prompt & context manipulation attacks
69
MATURITY
14
RULES
5
SUB-CATS
1
GAPS
64%
IMPL.
56
TESTS
1
STORIES
100%3 rules
Injection via tool descriptions and parameter fields
GAP-001Prompt Injection Coverage GapMissing detection coverage for emerging prompt injection attack variants not addressed by current rules
100%4 rules
Hidden instructions via external content and tool responses
100%2 rules
Context window saturation and prior-approval exploitation
100%3 rules
Payload hiding via invisible chars, base64, schema fields
100%2 rules
Injection via prompt templates and runtime tool output