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Security audit

redfin

Security checks for vulnerabilities and agentic risk

Overview

The skill’s disclosed Redfin lookups and signed-in browser access fit its purpose, with ordinary third-party software installation risks.

Install only if you trust redfin-mcp and the browser extension to access your Redfin session and return saved-account data to your agent. Prefer a reviewed package version, verify the extension download, and review pairing permissions. The skill uses unofficial Redfin endpoints that may change.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • 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
95% 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 19)May include surrounding context.

1. Install redfin-mcp

.mcp.json (project) or ~/.claude/mcp.json (global):

json
{

Static analysis

No suspicious patterns detected.