Back to skill

Security audit

homes

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed read-only homes.com lookup helper, with no artifact evidence of hidden commands, persistence, exfiltration, or destructive behavior.

Before installing, be aware that this uses your signed-in homes.com browser session through a separate bridge extension and an npm MCP package. Install only if you are comfortable giving that MCP read access to homes.com pages and saved homes/searches visible in that session, and verify the external package and extension source or checksums first.

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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (3)

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 homes-mcp

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

json
{

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
97% confidence
Finding

The manifest says the skill triggers on specific phrases "or any request involving homes.com properties, prices, history, or photos." That fallback condition is broad and ambiguous, making it unclear which requests should or should not invoke the skill beyond the listed examples.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
75% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 90)May include surrounding context.

md
## Response shape (`view`)

Five tools take `view: "compact" | "full"`, and **`compact` is the default** —
you get the slim shape without asking for it: `homes_search_properties`,
`homes_get_property`, `homes_bulk_get`, `homes_compare_properties`,
`homes_get_market_report`.

Static analysis

No suspicious patterns detected.