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Security audit

CardPointers

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward CardPointers CLI helper, with disclosed login/token use and no artifact evidence of hidden or destructive behavior.

Before installing, verify you trust the CardPointers Homebrew tap and CLI because it will handle your CardPointers login token and account data. Use normal user privileges, avoid sharing debug logs that may include sensitive output, and run cardpointers logout when you no longer want the token stored locally.

A.I.G

Vulnerability Patterns
  • Insecure DependenciesIntroduces malicious components through unsafe dependency sources
  • 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)

T08 · Insecure Dependencies

Warning
Location
SKILL.md:5
Finding

Unpinned CardPointers CLI Installation from a Third-Party Homebrew Tap

Content
View full analysis
Remediation
View remediation

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (1)

MCP Config Access

High
Category
Agent Snooping
Confidence
80% confidence
Finding

Skill accesses MCP server configuration files (mcp.json). MCP configs contain server URLs, authentication tokens, and tool definitions — reading them allows the skill to discover and potentially abuse other tool integrations.

Content

Scanner excerpt · SKILL.md (reported line 73)May include surrounding context.

bash
cardpointers status    # account info + connection test
cardpointers ping      # test MCP connection
cardpointers tools     # list available MCP tools
cardpointers login     # authenticate
cardpointers logout    # clear saved token
cardpointers --version # print version

Static analysis

No suspicious patterns detected.