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Security audit

Reddit Post Comments

Security checks across malware telemetry and agentic risk

Overview

The skill is aimed at fetching Reddit comments, but its documentation understates how it fetches data and uses unsafe shell-eval command templates.

Review before installing. The skill appears intended for Reddit comment collection rather than data theft or destruction, but it should more clearly disclose direct Reddit API access, possible browser-session use, and replace the bash eval pattern with safer validated execution.

SkillSpector

By NVIDIA
Vulnerability Patterns
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • 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 (3)

Lp3

Medium
Category
MCP Least Privilege
Confidence
91% confidence
Finding
The skill performs network-capable actions through Python scripts that call Reddit endpoints, but it does not explicitly declare that permission. Hidden or undeclared capabilities reduce transparency for reviewers and agents, making it easier for a skill to perform external data access that was not clearly authorized or expected. In this context the network use appears aligned with the skill's purpose, but the omission is still a real policy and security issue.

Description-Behavior Mismatch

Medium
Confidence
89% confidence
Finding
The skill description says it uses Reddit's public JSON API, but the execution instructions route through browser-act and page-state assumptions instead of a clean, direct API contract. This mismatch can mislead operators about what tool context, privileges, and data paths are actually used, which increases the risk of overbroad browser access and makes auditing harder. The issue is more dangerous because the skill also instructs users not to inspect scripts unless something fails.

Intent-Code Divergence

Medium
Confidence
94% confidence
Finding
The operational-boundary text claims the skill only reads data already visible in the browser and does not bypass access controls, but the documented commands fetch data from Reddit endpoints, including morechildren, outside that narrow boundary. This is a concrete trust-boundary violation: reviewers may approve the skill under a low-risk screen-scraping model while it actually performs additional network retrieval. That discrepancy undermines informed consent and can conceal broader data access behavior.

VirusTotal

65/65 vendors flagged this skill as clean.

View on VirusTotal

Static analysis

No suspicious patterns detected.