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Security audit

etix

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed Etix event-search integration that relies on a user-installed MCP server and browser bridge, with no hidden code or destructive behavior in the artifact.

Install only if you are comfortable running the etix-mcp npm package and fetchproxy browser extension, and understand that Etix requests will be made through your own browser tab and cookies. Keep the extension paired only when needed, and review Etix's terms because the integration uses website endpoints rather than an official public API.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • 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)

MCP Config Access

High
Category
Agent Snooping
Content
### 1. Install etix-mcp

`.mcp.json` (project) or `~/.claude/mcp.json` (global):

```json
{
Confidence
95% confidence
Finding
Skill accesses MCP server configuration files (mcp.json). MCP configs contain server URLs, authentication tokens, and tool definitions — reading them allows the skill to discover and potentially abuse other tool integrations.

Vague Triggers

Medium
Confidence
93% confidence
Finding
The trigger text is broad enough to activate on many generic requests involving events, venues, performers, or showtimes, which can cause the skill to run in contexts the user may not have intended. In this skill, unexpected activation is more sensitive because execution depends on a browser bridge using the user's live etix.com session, increasing the chance of unintended access to session-backed browsing activity or unnecessary external calls.

Static analysis

No suspicious patterns detected.