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Security audit

Erdmannsilva Perplexity

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward Perplexity web-search helper that sends user-provided queries to Perplexity using the user's API key.

Install only if you are comfortable providing a Perplexity API key and having your search queries sent to Perplexity. Do not include private credentials, confidential documents, or sensitive personal data in queries unless that is intended.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (3)

Lp3

Medium
Category
MCP Least Privilege
Confidence
87% confidence
Finding
The skill declares that it requires an environment variable and performs networked API calls, but it does not explicitly declare any tool scope such as permissions or allowed-tools. This creates an authorization gap where the runtime may grant broader-than-necessary capabilities or make the skill's external access insufficiently transparent to reviewers and users.

External Transmission

Medium
Category
Data Exfiltration
Content
}

async function search(queries) {
  const response = await fetch("https://api.perplexity.ai/search", {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${apiKey}`,
Confidence
60% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
}

async function search(queries) {
  const response = await fetch("https://api.perplexity.ai/search", {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${apiKey}`,
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Static analysis

No suspicious patterns detected.