Back to skill

Security audit

Fakerjs

Security checks for vulnerabilities and agentic risk

Overview

The skill appears non-destructive, but it advertises Fakerjs reference help while mostly providing generic placeholder devtools text.

Review this before installing because it may mislead an agent or user looking for real Fakerjs help. It does not show signs of stealing data or changing your system, but the published purpose and actual documentation quality do not line up.

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
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • 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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (3)

Credential Access

High
Category
Privilege Escalation
Confidence
70% confidence
Finding

Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Content

Scanner excerpt · scripts/script.sh (reported line 64)May include surrounding context.

sh
## Prerequisites
- Basic understanding of devtools concepts
- Required tools and access credentials
- System meeting minimum requirements

## Installation

Intent-Code Divergence

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The inline header claims the script is for working with Fakerjs in devtools contexts, yet the help and command outputs provide mostly generic devtools advice. In a skill ecosystem, this kind of semantic misrepresentation is dangerous because agents may select and trust the tool for Fakerjs-specific tasks and receive irrelevant or misleading output.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Medium
Category
Not specified by scanner
Confidence
98% confidence
Finding

The skill advertises itself as a Fakerjs reference tool, but nearly all emitted content is generic placeholder material unrelated to Fakerjs APIs, usage, or implementation patterns. This creates a deceptive mismatch between declared purpose and actual behavior, which can mislead users and downstream agents into relying on inaccurate guidance in development workflows.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.