Security audit

Headers

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward website security-header checker that makes user-directed HTTP requests and does not show hidden or persistent behavior.

Install only if you are comfortable with the skill making outbound web requests to the domains you ask it to inspect. Avoid pointing it at private internal services unless you intend to test those services from this environment.

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 Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
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)

Undeclared Tool Scope

Medium

Category: MCP Least Privilege
Confidence: 90% confidence
Finding: The skill advertises and invokes network-capable code (python3 scripts/headers.py github.com example.com) but does not declare any explicit tool scope such as permissions or allowed-tools. That mismatch weakens policy enforcement and user visibility, because a reviewer or runtime may not clearly understand that the skill performs outbound requests to arbitrary domains.
Content: No source excerpt is available for this finding.