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Security audit

Lacuna

Security checks for vulnerabilities and agentic risk

Overview

The research commands fit the skill’s purpose, but its setup instructions can execute changing remote code without clear user approval or limits on local changes.

Review and approve CLI setup separately before allowing this skill to install anything. Use a verified release and check its bundled-skill synchronization settings. Research requests pass through OOMOL and may use account credit. The installer scripts and deployed connector implementation were not verified; no malicious behavior was established in the bundled artifact.

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
  • 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 by executing a remotely retrieved script; it does not search or read Lacuna data. Nothing in the supplied chunk establishes that this installer is a necessary supporting component for Lacuna, so its remote-code execution and unrelated resource access materially differ from the declared purpose. The installer contents are not provided, so further behavior cannot be assessed.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a remote installer directly into Bash executes whatever the endpoint supplies with the agent process's privileges, without artifact pinning or independent integrity verification. A compromised distribution endpoint could therefore execute arbitrary code and access local data; the PowerShell installation alternative creates the same class of exposure.

Content

Scanner excerpt · SKILL.md (reported line 60)May include surrounding context.

First-time setup instructs automatic execution of downloaded installation scripts without warning about local system changes.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

If the CLI is missing, the skill directs the agent to install software by immediately executing a downloaded script, without requiring user approval or explaining local changes. This expands a research-reading task into local code execution; the missing-command condition limits exposure but does not authorize the installation or constrain its effects.

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 75)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