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Security audit

commute-carbon-counter

Security checks for vulnerabilities and agentic risk

Overview

This is a local commute-emissions calculator that clearly documents its trip logging and CSV export behavior, with no evidence of hidden network access, credential use, or unsafe persistence.

Before installing, be aware that trip dates, modes, distances, passengers, notes, and exports are stored locally in files you or the tool choose. Use it for personal planning and comparisons, not certified reporting, regulatory accounting, or offset purchases.

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
  • 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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (2)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
90% confidence
Finding

The skill advertises persistent logging to ~/.commute-carbon.json and CSV export, which implies file write capability, but the manifest does not declare any permissions or allowed-tools scope. That creates a mismatch between documented behavior and declared access, weakening least-privilege guarantees and making it harder for a host system or reviewer to constrain where data may be written.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
88% confidence
Finding

The description says to use the skill when the user wants to know the carbon footprint of daily commute or travel habits, is deciding between commuting modes, tracking a personal emissions goal, or preparing an environmental impact report. These triggers are broad natural-language situations rather than a narrow command scope, which could cause unintended invocation for general sustainability or reporting conversations.

Content

No source excerpt is available for this finding.