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Security audit

Hotjar

Security checks for vulnerabilities and agentic risk

Overview

The Hotjar workflow has deletion safeguards, but its setup can execute unverified remote code and introduce broader agent changes without clear user approval.

Review the setup before installing. Use a vetted, fixed CLI release, approve local installation changes explicitly, and review or disable its automatic skill synchronization. OOMOL mediates access to your connected Hotjar account; approve the exact target before any deletion. The mutable remote installer remains unverified.

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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied code performs remote script execution from an unrelated service rather than any demonstrated Hotjar operation. Although installing dependencies can be a supporting implementation detail, this chunk establishes no connection between the Oomol installer and the declared Hotjar functionality. The downloaded script's contents and further effects are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The curl-to-bash command executes mutable remote content without a pinned version or independent integrity verification; the PowerShell alternative uses the same download-and-execute pattern. Compromise of the installer distribution path could execute arbitrary code with the agent's local permissions, despite HTTPS and the legitimate CLI dependency.

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

The setup workflow executes a downloaded installation script without warning the user about remote code execution or local system changes.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The fallback directs the agent to install software by immediately executing a remote script, without first obtaining approval for local code execution and system changes. Although triggered only when the CLI is missing, this crosses from operating Hotjar into modifying the local environment with the agent's permissions.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 79)May include surrounding context.

md
- **`OOMOL_INSUFFICIENT_CREDIT`** — OOMOL billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

- **HTTP 402 without `OOMOL_INSUFFICIENT_CREDIT`** — the third-party account itself has no active plan or credit. Report the provider error message as is; do not ask the user to recharge OOMOL.

## Resources