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Security audit

Ucp Buyer Consent

Security checks for vulnerabilities and agentic risk

Overview

This is a documentation-only coding helper for UCP buyer consent flows, with one minor wording inconsistency but no hidden execution or unsafe authority.

Before installing, understand that this skill may cause the agent to look up UCP documentation online and may guide changes to checkout consent handling. Verify the canonical UCP spec during implementation, especially the consent field names and whether any enumerations actually exist.

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
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • 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)

Intent-Code Divergence

Low
Category
Not specified by scanner
Confidence
91% confidence
Finding

Lines L38-L43 explicitly say Buyer Consent has exactly four fields and each value is a simple boolean with no status enum. Line L90 then tells implementers to fetch the spec for 'consent type enumerations,' which conflicts with the earlier claim that no such enumeration exists. This is a documentation-level contradiction about the skill's intended data model.

Content

No source excerpt is available for this finding.