Back to skill

Security audit

Fía Signals

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed crypto API wrapper, but its artifacts overpromise trading/security capabilities and paid network use is not scoped clearly enough.

Review this before installing if you expect reliable trading, audit, or wallet-risk analysis. Treat outputs as third-party market data, not financial or security advice, and require explicit confirmation before any paid x402 endpoint is used.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Rogue AgentSelf-Modification, Session Persistence
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (4)

Tp4

High
Category
MCP Tool Poisoning
Confidence
95% confidence
Finding

The skill description materially overclaims capabilities, including unsupported analytics and broad 'free tier' access while several functions are premium-gated. In an agent setting, this can mislead routing and trust decisions, causing the model or user to rely on nonexistent or paid-only security, trading, or audit features and potentially make unsafe financial or security decisions based on incomplete coverage.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The README prominently advertises network-backed commands and x402 micropayment usage, including paid commands with per-call prices, but does not provide an explicit safety warning that running the script will contact external services and may trigger charges. In an agent/automation context, this omission increases the risk of unintended outbound requests and unexpected spending, especially if users assume commands are local or harmless previews.

Content

No source excerpt is available for this finding.

Session Persistence

Medium
Category
Rogue Agent
Confidence
60% confidence
Finding

Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Content

Scanner excerpt · README.md (reported line 205)May include surrounding context.

./scripts/fia_signals.sh help

text

### Step 2 — Create a zip or push to GitHub

```bash
# Option A: zip

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
88% confidence
Finding

The skill advertises executable usage via a local shell script and external API access, but it does not declare any explicit tool scope such as allowed shell or network permissions. That omission weakens policy enforcement and review because an agent may invoke network and shell capabilities without a clearly documented boundary, increasing the chance of unintended command execution or data egress.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.