Security audit

Nano settlement verify

Security checks for vulnerabilities and agentic risk

Overview

This skill is a small read-only Nano payment verifier whose network access is disclosed and aligned with its purpose.

Install only if you are comfortable with the skill contacting a Nano RPC server, and prefer a trusted HTTPS RPC endpoint because the block hash, expected amount, and account are sent to that node for verification.

A.I.G

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

SkillSpector

Vulnerability Patterns

MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code

Findings (1)

Undeclared Tool Scope

Medium

Category: MCP Least Privilege
Confidence: 89% confidence
Finding: The skill performs network access to a Nano RPC endpoint but does not declare any tool scope, permissions, or allowed-tools metadata to make that capability explicit. Undeclared network access weakens policy enforcement and user transparency, and if an attacker can influence the RPC URL or republish the skill with modified code, it could enable unexpected outbound requests, data exfiltration, or SSRF-style access to internal endpoints.
Content: No source excerpt is available for this finding.