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Security audit

Pwa Implementation

Security checks for vulnerabilities and agentic risk

Overview

This is a coherent PWA implementation skill that gives disclosed, purpose-aligned guidance for manifests, service workers, offline caching, and update prompts.

Installers should treat this as a normal PWA guidance skill. When applying it, review service worker scope and caching rules carefully so authenticated, payment, permission-changing, or write endpoints remain network-only and users receive clear update prompts.

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)

Skill Enumeration

Medium
Category
Agent Snooping
Confidence
80% confidence
Finding

Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.

Content

Scanner excerpt · README.md (reported line 10)May include surrounding context.

md
- ID: `fec-pwa-implementation`
- Category: `implementation-capability`
- Version: `2.9.0`
- Source: `skills/fec-pwa-implementation/SKILL.md`

## Description

Static analysis

No suspicious patterns detected.