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Security audit

Timeline Chart Generator

Security checks for vulnerabilities and agentic risk

Overview

This skill locally generates timeline images, with the main consideration being optional system font installation for Chinese text rendering.

Install this if you need a local Python timeline chart generator, especially for Chinese text. Review the font setup first: running the documented apt-get and fc-cache commands changes the local system and may require elevated privileges. The template writes image output to the path you provide, so choose an appropriate output location.

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 (5)

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 67)May include surrounding context.

md
- `SKILL.md`: This documentation

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
72% confidence
Finding

The skill description and feature list prominently frame the skill around Chinese support, but do not indicate whether language or locale behavior is optional or user-selectable. Under the language/locale policy, this can be read as privileging a specific locale without explicit opt-in or clarification that support is additive rather than enforced.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
79% confidence
Finding

This markdown file includes apt-get install -y fonts-noto-cjk, which performs a system-level package installation and cache refresh. The documentation presents these commands as routine setup steps without any warning that they will modify the host environment or require elevated privileges.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
90% confidence
Finding

The manifest description and authoring language indicate the skill is explicitly tailored for Chinese display and presented entirely in Chinese, emphasizing support for Chinese text without offering any language or locale choice. Under the policy, forcing or assuming a specific language/locale without user opt-in can be a natural-language policy violation unless clearly documented as a justified region-specific tool.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
92% confidence
Finding

The module docstring, function docstring, parameter descriptions, and default title all assume Chinese-language use. Under the policy, forcing a specific language without user opt-in can be a natural-language policy violation when no alternative or justification is provided.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.