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Security audit

blackwood-state

Security checks for vulnerabilities and agentic risk

Overview

The skill openly documents paid API services with spending controls, though users should review its full service list and consider what data they share.

Review the full endpoint catalog and agree on a total budget before paying. Share only content you are comfortable sending to Blackwood State and its processing providers. Use a lightly funded dedicated wallet and enable optional private-key signing only if needed.

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
Vulnerability Patterns
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (3)

MCP server referenced without pinned version: 'npx envVars'.

Medium
Category
MCP Rug Pull
Confidence
70% confidence
Finding

npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Content

No source excerpt is available for this finding.

API-calling instructions omit a privacy warning about sending user content to external services.

Medium
Category
Output Handling
Confidence
90% confidence
Finding

The skill instructs the agent to POST request bodies to externally hosted endpoints, including for text processing and chat tasks, but never warns that supplied user content leaves the local environment. The payment approval requirement discloses spending, not disclosure of potentially sensitive input to Blackwood State and its processing providers.

Content

No source excerpt is available for this finding.

The skill provides paid weather, travel, media-generation, QR-code, and random-number operations outside its manifest's stated scope.

Medium
Category
Excessive Agency
Confidence
99% confidence
Finding

The manifest at L003 limits the skill to onchain data, ECB exchange rates, and quick AI text utilities. However, L103–L123 supplies callable POST endpoints for weather forecasts, airport delays, time-zone conversion, image and speech generation, QR codes, and random numbers. These are distinct paid services rather than implementation details of the declared functions, expanding what the agent can invoke and spend funds on.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.