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Security audit

kids-allowance-ledger

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed local allowance ledger that stores user-entered child allowance records in a JSON file and does not show hidden network, credential, persistence, or destructive behavior.

Install only if you are comfortable with the agent running the bundled Python script and creating or updating a local allowance_ledger.json file. Use --store to choose a specific ledger path if you want tighter control over where child allowance data is kept.

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
  • 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 (1)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
86% confidence
Finding

The skill references a local JSON store and invokes a Python script that reads and writes files, but it does not declare any explicit tool scope such as permissions or allowed-tools. That creates an under-specified trust boundary: an agent may infer broader filesystem access than intended, and future changes to the script could expand file operations without any policy guardrails.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.