Security audit

A Share Metrics Card

Security checks for vulnerabilities and agentic risk

Overview

This stock-card skill is purpose-aligned overall, but needs review because its script can overwrite arbitrary local files if given a crafted output path or stock symbol.

Install only if you are comfortable with a skill that writes local files. Use a normal six-digit stock symbol and keep output paths under notes/stocks/cards; review or patch the script to validate symbols, reject path traversal, and avoid overwriting existing files without confirmation.

A.I.G

Vulnerability Patterns

Insecure Skill Coding PracticesFinds exploitable flaws such as hardcoded secrets or command injection
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

Findings (1)

T09 · Insecure Skill Coding Practices

Warning

Location: scripts/metrics_card.py:27
Finding: Unrestricted Output Path Allows Arbitrary File Overwrite
Content: View full analysis
Remediation: View remediation

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 (2)

Undeclared Tool Scope

Medium

Category: MCP Least Privilege
Confidence: 95% confidence
Finding: The skill explicitly plans to use network access to fetch stock data and to write a Markdown file, but it does not declare any tool restrictions or permissions. This creates an overbroad execution profile where an agent runtime may grant more capabilities than are necessary or fail to surface the risk to users, increasing the chance of unintended file writes or unreviewed external data access.
Content: No source excerpt is available for this finding.

Missing User Warnings

Low

Category: Not specified by scanner
Confidence: 89% confidence
Finding: The skill says it will write a generated Markdown card to outputPath by default, but it does not clearly warn the user that invoking the skill modifies local files. Even though the default path appears intended for notes, silent file creation or overwrite can surprise users and becomes riskier if outputPath is user-controlled or if existing files are replaced.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.