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Security audit

Local File Converter

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward local file converter that runs common conversion tools and writes converted files locally.

Install only the converters you need, review conversion commands for the intended input and output paths, and avoid running bulk or overwrite-prone conversions on important directories without backups.

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
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (4)

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The manifest description and primary instructional content are written in Chinese, while the skill title is in English and there is no indication that the skill is intentionally region-specific or that users can choose their preferred language. This creates a natural-language locale constraint without opt-in.

Content

No source excerpt is available for this finding.

Sudo/Root Execution

Medium
Category
Privilege Escalation
Confidence
70% confidence
Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · SKILL.md (reported line 32)May include surrounding context.

bash
# Debian/Ubuntu
sudo apt install ffmpeg imagemagick libreoffice pandoc calibre

# macOS
brew install ffmpeg imagemagick libreoffice pandoc

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
97% confidence
Finding

The script includes user-facing comments and console messages in Chinese, such as the error text at L15, with no indication that the skill is region-specific or that users can opt into another language. This creates a natural-language locale policy issue because it imposes a specific language by default.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
88% confidence
Finding

This markdown skill description says it will execute conversion commands and return a result file path, but it does not clearly warn users that the process creates output files on disk. Because this skill affects user data and filesystem state, the description should disclose that behavior so users understand files will be written locally.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.