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Security audit

myfood-by

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward food inventory and meal recommendation helper that only stores and edits a local inventory markdown file for its stated purpose.

Install this if you are comfortable with the agent keeping a local food inventory file and removing items from it when you say they are eaten. Do not put private health details into inventory entries; provide dietary needs only when asking for recommendations.

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
  • 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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (2)

Missing User Warnings

Medium
Confidence
94% confidence
Finding
The skill explicitly instructs persistent writes to and deletions from a local markdown file, but it does not clearly warn the user that local files will be modified as a side effect of normal use. This creates a consent and integrity risk: users may not realize data is being stored locally, and an agent following the skill could overwrite or remove records without sufficiently explicit confirmation or safeguards.

Natural-Language Policy Violations

Low
Confidence
85% confidence
Finding
The skill's name, description, and operating instructions are entirely in Chinese, with no indication that users may choose another language or that the skill is intentionally limited to a Chinese-speaking context. This can violate language/locale policy when a skill implicitly forces a specific language without user opt-in.

Static analysis

No suspicious patterns detected.