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Security audit

seo-schema

Security checks for vulnerabilities and agentic risk

Overview

This skill is a coherent SEO structured-data helper with minor usability and documentation issues but no artifact-backed malicious or high-impact behavior.

Before installing, be aware that this skill may be invoked too broadly when you say "markup" and may lead an agent to create SEO report or JSON-LD output files. Review generated schema before publishing it, especially where the guidance relies on changing Google rich-result policies.

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
Vulnerability Patterns
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • 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
Findings (3)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

Using the trigger term "markup" is overly broad and can cause the skill to activate in unrelated contexts such as HTML, Markdown, or general formatting tasks. Over-broad invocation increases the chance the agent applies schema-specific tooling or advice when the user did not intend it, which can lead to incorrect actions, unnecessary file generation, or confusion in multi-skill environments.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
84% confidence
Finding

The skill advertises output files like SCHEMA-REPORT.md and generated-schema.json without warning that these files may be created or overwritten. In an agentic environment, undocumented file writes can surprise users, overwrite existing work, or place generated content in unintended locations, especially if execution is automated.

Content

No source excerpt is available for this finding.

Intent-Code Divergence

Low
Category
Not specified by scanner
Confidence
95% confidence
Finding

The file states at L065-L066 that Dataset is 'Not discontinued' and specifically supported for Google Dataset Search, but L216 groups Dataset with FAQPage and HowTo as no longer producing Google Search rich results. This is an active documentation-level contradiction within the skill instructions about how Dataset should be treated.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.