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Security audit

ATSPrep: Interview prep

Security checks for vulnerabilities and agentic risk

Overview

The skill provides interview coaching through disclosed external services, with no hidden execution or unrelated access found.

Use this skill if you are comfortable sending selected resume details and interview answers to ATSPrep, with AI answer review also using Cloudflare Workers AI. Remove unnecessary personal or confidential information, keep temporary files private and delete them afterward, and check any ATSPREP_MCP_URL override. The bundled code was fully inspected, but the remote service's privacy promises were not independently verified.

A.I.G

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

SkillSpector

Vulnerability Patterns
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (5)

Incomplete referenced artifact analysis

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 23)May include surrounding context.

md
node scripts/atsprep.mjs <tool> key=value key=@path/to/file.txt

Incomplete referenced artifact analysis

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 25)May include surrounding context.

md
n the current working directory first, and delete it when you're done. `node scripts/atsprep.mjs list` lists the tools.

Skill declares no tool scope ('permissions' or 'allowed-tools') but code capabilities were detected: env, network.

Medium
Category
MCP Least Privilege
Confidence
70% confidence
Finding

Without declared permissions the skill's intent is opaque and cannot be validated.

Content

No source excerpt is available for this finding.

Behavior Manipulation

Medium
Category
Prompt Injection
Confidence
75% confidence
Finding

Subtle instructions detected that may alter agent decision-making or introduce hidden biases.

Content

Scanner excerpt · SKILL.md (reported line 42)May include surrounding context.

md
- The stronger answer may only use facts from the user's own answer. If a result needs a number, ask what it was.
- Keep feedback short and specific. One fix per answer beats ten.
- Never tell the user to claim experience they don't have.

Unrestricted Tool Access

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill grants unrestricted tool access without appropriate constraints. An agent with unfettered tool access can perform arbitrary actions including file modification, network requests, and code execution.

Content

Scanner excerpt · references/tools.md (reported line 3)May include surrounding context.

ATSPrep MCP tools

Endpoint: https://atsprep.com/mcp (MCP streamable HTTP, no auth). Call any tool with:

sh
node scripts/atsprep.mjs <tool> key=value key=@file.txt