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Security audit

FFHub

Security checks for vulnerabilities and agentic risk

Overview

The FFHub workflow is coherent, but its setup fallback tells the agent to execute an unverified remote installer without a separate user approval step.

Review the setup fallback before installing. Install the required CLI through a separately reviewed process and require approval before the agent runs an installer. Understand that OOMOL mediates access to your FFHub account, and retain confirmation for task creation. The bundled instructions show no malicious intent, but the external installers' exact effects remain 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
98% confidence
Finding

The supplied command installs software from an Oomol domain rather than performing FFHub data operations. Nothing in the supplied content establishes this installer as a supporting FFHub dependency. The remote script's contents and further effects are not visible.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command downloads a mutable external script and immediately executes it with the invoking user's privileges, without version pinning or independent integrity verification. Compromise of the installer delivery infrastructure could therefore expose local credentials or modify files; HTTPS and the legitimate dependency context reduce some risks but do not establish the script's integrity. The PowerShell alternative has the same weakness, although an enforced Bash(oo *) restriction may prevent either installation path from running.

Content

Scanner excerpt · SKILL.md (reported line 57)May include surrounding context.

The fallback setup executes remotely downloaded installation scripts without warning the user about local code execution and system changes.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The fallback tells the agent to install software after a missing-command error without first explaining the local execution and system changes or obtaining approval. Although limited to first-time setup, this expands a remote FFHub task into local software installation; the write-confirmation rule covers FFHub state rather than clearly covering this operation.

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 78)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