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Security audit

Fx Radar

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward exchange-rate lookup tool that makes disclosed public market-data requests and does not show hidden persistence, credential use, or destructive behavior.

Install this if you are comfortable with a Chinese-language FX tool making live requests to Yahoo Finance and Frankfurter.app. Review the broad trigger terms if you want tighter activation, and do not treat the printed threshold commentary as financial advice.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (4)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
93% confidence
Finding

The skill performs outbound network access to Yahoo Finance but does not declare any tool scope or allowed-tools restriction. This weakens least-privilege controls and makes the skill's external data access implicit rather than auditable, which can enable unexpected network use if the skill is modified or invoked in broader contexts.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The trigger list contains broad generic terms such as '汇率', '外汇', and '换汇', which can cause the skill to activate for ambiguous everyday finance conversations rather than clear user intent. Overbroad invocation increases the chance of unintended external requests and misleading context injection, especially because the skill fetches live network data and provides market interpretation.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The file’s title, comments, docstrings, console output, and interpretive messages are written only in Chinese, which imposes a specific language on users without any opt-in or alternative locale handling. Under the policy, a skill should not force a language or locale unless it explicitly offers choice or clearly documents a justified regional constraint.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · scripts/fx_spot.py (reported line 74)May include surrounding context.

python
"""欧洲央行汇率(备用数据源,不需要 key)"""
    results = {}
    try:
        url = f"https://api.frankfurter.app/latest?base=USD&symbols={','.join(ECB_PAIRS)}"
        r = requests.get(url, headers={"User-Agent": "Mozilla/5.0"}, timeout=15)
        r.raise_for_status()
        data = r.json().get("rates", {})

Static analysis

No suspicious patterns detected.