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Security audit

Hoop

Security checks for vulnerabilities and agentic risk

Overview

The Hoop data access fits its purpose, but setup directs the agent to execute an unverified online installer without a clear user approval step.

Review and install a verified CLI release yourself before enabling this skill, and check its automatic skill synchronization settings. Connecting Hoop entrusts OOMOL with access to the connected account. The complete bundled Markdown was inspected; the scanner's reference gaps do not indicate missing artifact files. Remote installer and hosted-service behavior remain outside the verified artifact.

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 command performs remote installer execution, not Hoop data searching or reading. Installing software from an unrelated service is a materially different, undeclared capability. The downloaded script is not supplied, so its additional effects cannot be determined.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command pipes a mutable remote script directly into Bash without version pinning or independent integrity verification; the PowerShell alternative has the same execution pattern. If the distribution endpoint or release pipeline is compromised, attacker-controlled code could execute with the invoking user's permissions, exposing local data and credentials; HTTPS and the missing-CLI prerequisite reduce some exposure but do not establish script integrity.

Content

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

The setup workflow executes downloaded installation scripts without warning the user about remote-code execution or system changes.

Medium
Category
Output Handling
Confidence
95% confidence
Finding

A missing CLI triggers instructions to execute downloaded shell or PowerShell code without first obtaining approval for installation or explaining its system effects. Although conditional setup is relevant to the skill, authorization to read Hoop data does not necessarily authorize executing an installer with the agent's local 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 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