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Security audit

Fennec SEO Auditor Skills

Security checks for vulnerabilities and agentic risk

Overview

The skill is a disclosed SEO-audit helper that relies on a user-installed browser extension, with no hidden code or automatic data access in the skill package.

Review the Chrome extension permissions before installing, run it only on pages you are comfortable auditing, and share only the report excerpts needed for SEO advice. The skill itself is instructional and does not install code or access browser data automatically.

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
  • 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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (1)

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
82% confidence
Finding

The skill file is written as a Chinese-localized instruction set and presents the skill title and usage entirely in Chinese, with no note that users may choose another language. Under the policy, language or locale constraints should be opt-in or explicitly justified; this file does not provide that choice or justification.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.