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Security audit

Helius Wallet API

Security checks for vulnerabilities and agentic risk

Overview

This skill is a read-only Helius wallet lookup helper with disclosed API-key setup and no hidden persistence or destructive behavior.

Install only if you are comfortable using a Helius API key through UXC and sending wallet addresses, balance/history filters, and related lookup parameters to Helius. Keep use to the documented read-only endpoints and review the remote schema source if strict change control is required.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

Tp4

High
Category
MCP Tool Poisoning
Confidence
95% confidence
Finding

The declared description says the skill operates the Helius Wallet API via UXC with curated schema and auth guardrails. The supplied code chunk is only a validation script for the skill package. It ensures required files exist, checks JSON schema structure and specific Helius paths, and verifies that documentation/config files contain expected commands and guardrail text. This is a materially different primary purpose from actually operating or interfacing with the Helius Wallet API. While the script is related to the same skill and supports its packaging, the code itself does not perform the declared API operation behavior.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
86% confidence
Finding

The OpenAPI skill sends wallet addresses and related query parameters such as history filters to an external third-party API, but the manifest content shown provides no user-facing disclosure or consent warning about that transmission. Wallet addresses are sensitive in many contexts because they can reveal holdings, transaction history, counterparties, and investigative intent, so silent forwarding creates a privacy and trust risk even if the API is read-only.

Content

No source excerpt is available for this finding.