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Security audit

Cin7 Core

Security checks for vulnerabilities and agentic risk

Overview

The Cin7 reading workflow fits its purpose, but setup can execute unverified remote code without a separate user approval step.

Review and install the CLI separately from a verified release before allowing this skill to run. Check its automatic agent-skill synchronization settings and confirm that routing Cin7 access through OOMOL is acceptable. The bundled reading instructions show no malicious behavior, but the remote installer and connector implementation 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
99% confidence
Finding

The supplied chunk performs remote installer execution and contains no Cin7 Core data-access functionality or evidence connecting the installer to that functionality. This is materially different from the declared purpose, not merely a demonstrated supporting implementation detail. The downloaded script's contents and further effects cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command streams a mutable remote script directly into Bash without version pinning or independent integrity verification; the PowerShell alternative has the same weakness. A compromised distribution endpoint could execute arbitrary code with the agent's local permissions, potentially exposing accessible files and credentials, even though the installation source appears relevant and no malicious payload is shown.

Content

Scanner excerpt · SKILL.md (reported line 59)May include surrounding context.

The setup workflow executes downloaded installer scripts without warning about their system-level effects.

Medium
Category
Output Handling
Confidence
93% confidence
Finding

On a missing-command error, the skill directs the agent to install software without requiring approval for local system changes or explaining the installer's privileges and effects. Although this is a conditional prerequisite rather than the normal read workflow, it expands a data-reading request into execution of remote code with the invoking user'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 80)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