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Security audit

Zipcodebase

Security checks for vulnerabilities and agentic risk

Overview

The postal-code workflow fits its purpose, but its setup can execute unverified software and introduce broader agent changes without clear user control.

Review the CLI dependency before enabling this skill. Preinstall a reviewed version, disable automatic skill synchronization using the documented OO_SKILLS_SYNC_DISABLED control, and connect only the intended Zipcodebase account. Queries pass through OOMOL. The scanner's mismatch and billing concerns are unsupported in context; the material concerns are uncontrolled installation and broader persistent agent changes. Exact installer behavior remains unverified. [CLI controls](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md)

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 (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied command executes a remote installer and contains no Zipcodebase search or read operation. Nothing in the supplied chunk establishes this installer as a necessary supporting dependency for Zipcodebase access. The downloaded script's further behavior is not visible, but its immediate execution is directly established.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
88% confidence
Finding

The supplied chunk only performs a login operation; it contains no Zipcodebase search or data-reading behavior. Authentication could support an API integration, but this code does not establish that relationship, and its sole visible function differs materially from the declared purpose.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
99% confidence
Finding

Piping a mutable HTTPS response directly into Bash executes remote code without a separate verification or review step. HTTPS protects transport but does not protect against compromise of the legitimate distribution service; exploitation could expose local credentials and files or modify the user's environment.

Content

Scanner excerpt · SKILL.md (reported line 61)May include surrounding context.

The setup workflow executes downloaded installation scripts without warning about the system-integrity implications.

Medium
Category
Output Handling
Confidence
97% confidence
Finding

The fallback workflow directs execution of downloaded shell and PowerShell scripts without an explicit approval gate or integrity verification. Although conditional setup reduces exposure, a compromised distribution endpoint or altered installer could execute arbitrary 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 82)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