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Security audit

subreddit-scout

Security checks for vulnerabilities and agentic risk

Overview

This skill is a simple Reddit research checklist with no code, persistence, credential use, or automatic posting behavior.

Before installing, understand that the skill may lead your agent to research Reddit communities and suggest promotional angles. Review subreddit rules yourself before posting, but this artifact does not request account access or perform posts automatically.

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
  • System Prompt LeakageDirect Leakage, Indirect Extraction, Tool-Based Exfiltration
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • 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)

Indirect Prompt Extraction

Medium
Category
System Prompt Leakage
Content
---
name: subreddit-scout
description: Find high-fit subreddits for a product, summarize rules, and suggest value-first posting angles.
---

# Subreddit Scout
Confidence
75% confidence
Finding
Skill contains patterns that could indirectly extract system prompts through rephrasing, translation, summarization, or side-channel techniques.

Vague Triggers

Medium
Confidence
86% confidence
Finding
The phrase 'Use this skill when launching a product via Reddit' gives only a broad situational trigger and does not define specific invocation phrases, boundaries, or exclusion conditions. This ambiguity could cause the skill to be invoked for general Reddit marketing conversations rather than a clearly scoped subreddit-research task.