Security audit

Cover Letter Drafter

Security checks for vulnerabilities and agentic risk

Overview

The skill is a straightforward cover-letter generator, but its optional output file setting can overwrite arbitrary writable files without path limits or overwrite protection.

Install only if you are comfortable with a local Python script that can write files when an output path is supplied. Use a dedicated output filename in the workspace and avoid passing existing files, absolute paths, parent-directory paths, or symlinked destinations until the script adds path validation and overwrite protection.

A.I.G

Vulnerability Patterns

Insecure Skill Coding PracticesFinds exploitable flaws such as hardcoded secrets or command injection
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

Findings (1)

T09 · Insecure Skill Coding Practices

Warning

Location: scripts/main.py:197
Finding: Unrestricted Output Path Allows Arbitrary File Creation and Overwrite
Content: View full analysis
Remediation: View remediation

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 (2)

Undeclared Tool Scope

Medium

Category: MCP Least Privilege
Confidence: 86% confidence
Finding: The skill documentation indicates code/script behavior with file-write capability, but it does not declare any explicit tool scope such as permissions or allowed-tools. This creates an authorization and transparency gap: an agent or user may invoke a skill that writes files without clear policy constraints, increasing the risk of unintended file creation or overwrite in the workspace.
Content: No source excerpt is available for this finding.

Missing User Warnings

Low

Category: Not specified by scanner
Confidence: 90% confidence
Finding: The markdown states that the skill can write an output JSON file, but it does not clearly warn that execution may create or overwrite files in the workspace. This is primarily a user-safety and integrity issue: operators may unintentionally lose data or modify files because the write side effect is under-disclosed.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.