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Security audit

onehome

Security checks for vulnerabilities and agentic risk

Overview

The skill coherently supports reading OneHome listings using disclosed account access, with no harmful instructions found in the supplied artifact.

Use a trusted OneHome MCP server and protect bearer tokens and magic links like passwords. Browser capture grants access through your signed-in OneHome session. Compact mode removes media URLs, not personal account information. The supplied documentation was fully inspected, but the separate server's security controls and credential storage could not be 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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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
Findings (1)

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 52)May include surrounding context.

md
Four tools take `view: "compact" | "full"` — `onehome_get_by_address`,
`onehome_compare_properties`, `onehome_get_user` and `onehome_graphql` — and
**`compact` is the default**. You get the slim shape without asking for it;
an efficiency a caller has to request is one that is usually not requested.

**What compact does here is strip image and avatar URLs, and nothing else.**