Back to skill

Security audit

Resume Builder

Security checks for vulnerabilities and agentic risk

Overview

This resume-building skill is coherent and purpose-aligned, with no evidence of hidden data access, persistence, exfiltration, or unsafe automatic behavior.

Before installing, expect the skill to handle personal resume details locally and write resume outputs to the chosen output directory. Review generated files before sharing them, and note that this package may be incomplete because the renderer expects a missing Typst template file.

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
  • System Prompt LeakageDirect Leakage, Indirect Extraction, Tool-Based Exfiltration
  • Behavioral ASTexec() Call, eval() Call, Dynamic Import
  • 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
Findings (3)

Direct Prompt Extraction

High
Category
System Prompt Leakage
Confidence
85% confidence
Finding

Skill contains instructions that could directly expose system prompts, internal rules, or hidden instructions to users or external parties.

Content

Scanner excerpt · SKILL.md (reported line 134)May include surrounding context.

md
Success requires `resume.pdf` to exist.

## Output Rules

- Return a concise summary of what was generated.
- State the output file paths clearly.

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
96% confidence
Finding

The skill requires shell execution (python3, typst) and file read/write behavior but does not declare an explicit tool/permission scope. That creates an overbroad execution surface where an agent or runtime may grant more capability than intended, increasing the risk of unsafe file access or command execution through downstream inputs or implementation details.

Content

No source excerpt is available for this finding.

subprocess module call

Medium
Category
Dangerous Code Execution
Confidence
70% confidence
Finding

subprocess module calls execute external commands. Without careful input validation, this enables command injection.

Content

Scanner excerpt · scripts/render_resume.py (reported line 126)May include surrounding context.

python
shutil.copyfile(template_path, typ_path)

    cmd = ["typst", "compile", str(typ_path), str(pdf_path)]
    result = subprocess.run(cmd, capture_output=True, text=True)
    if result.returncode != 0:
        if pdf_path.exists():
            pdf_path.unlink()

Static analysis

No suspicious patterns detected.