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Security audit

Mattress Buying Consultant

Security checks for vulnerabilities and agentic risk

Overview

This is a plain instruction-only mattress buying guide with purpose-aligned questions and no executable code, persistence, credential use, or hidden system changes.

This appears safe to install as a consultation aid. Before using it, be aware it may ask personal comfort, health, weight, and location questions; provide coarse answers such as country/region instead of city and skip medical details unless they are needed for the recommendation.

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 (2)

Missing User Warnings

Medium
Confidence
93% confidence
Finding
The skill instructs the agent to collect health-related information (back pain, joint pain, allergies, elderly mobility issues) and precise location data (country and city) as required inputs, but provides no notice that these details are sensitive, no minimization guidance, and no option for the user to decline or give coarse-grained answers. This creates unnecessary privacy risk because the agent may pressure disclosure of personal and potentially special-category data before providing assistance.

Autonomous Decision Making

Medium
Category
Excessive Agency
Content
- Selecting firmness purely on "back pain = firm" assumption → medium-firm (5–7) is the
     evidence-supported range for most back pain; ultra-firm often worsens pain for side sleepers
   - Not checking adjustable base compatibility before purchasing
   - Choosing mattress solely by coil count without checking coil quality (pocketed vs bonded)
     or foam density
   - Ignoring off-gassing for foam mattresses in poorly ventilated rooms — ventilate new foam
     mattresses for 24–72 hours before regular use
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.

Static analysis

No suspicious patterns detected.