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Security audit

honeybook

Security checks for vulnerabilities and agentic risk

Overview

The skill describes a coherent HoneyBook integration with disclosed session storage and explicit approval for outgoing messages, signing, and payment links.

Use a trusted MCP server and treat magic links and cached sessions as credentials. Messages reach everyone in the workspace, so review recipients and content before approval. Prefer compact responses and request raw vendor data only when necessary. This review covers the complete bundled instructions; external server behavior and credential protections were not 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 38)May include surrounding context.

md
Only **two** tools here take the fleet's `view` parameter: `get_project` and
`get_flow`. Both honour `compact | raw`, and **`compact` is the default** — you
get the cheap shape without asking for it. There is no `full` rung on either:
`raw` already IS every field HoneyBook sent, so a third value would silently
alias to one of the other two.