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Security audit

hash-verifier

Security checks for vulnerabilities and agentic risk

Overview

This is a small hash-verification skill with no bundled executable code, but its documentation is broad and asks for an API key without enough handling guidance.

Before installing, confirm what HASH_API_KEY is for and avoid hardcoding or printing it. Also note that the referenced verifier script is not included in this artifact, so the skill may be incomplete unless supplied elsewhere.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

This markdown file describes when to use the skill with broad phrases like 'validation related functionality', 'Automating hash tasks', and 'Security operations' without clearly defining scope or exclusions. These descriptions are generic enough to overlap with many unrelated requests and do not provide negative examples or specific trigger constraints.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
86% confidence
Finding

The skill requires a credential via an environment variable but provides no warning about secure handling, storage, redaction, or avoiding exposure in logs and shell history. In security-oriented workflows, this can lead users to mishandle the API key, increasing the risk of credential leakage and unauthorized use of the backing service.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.