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Security audit

MOCO

Security checks for vulnerabilities and agentic risk

Overview

The MOCO reading functions are clearly scoped, but setup can trigger execution of an unverified remote installer without a clear approval step.

Review and install a fixed CLI release separately before enabling this skill, and require approval for installation or changes to other agent skills. OOMOL mediates access to your MOCO account, so review the permissions you connect. The concrete concern is setup control; the artifact does not establish malicious behavior.

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 code performs a remote installation rather than the declared MOCO data-access function. Nothing in the chunk establishes that the Oomol installer is a supporting dependency for MOCO access. The remote script's contents are unavailable, so its further actions cannot be determined.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a remotely fetched installer directly into Bash executes its current contents with the agent process's privileges, without a pinned version or independent integrity verification. Compromise of the installer distribution could therefore expose local data or permit arbitrary system changes; the Windows download-and-execute example has the same issue. HTTPS and the setup-only trigger reduce some exposure but do not verify the publisher's delivered code.

Content

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

Fallback installation executes downloaded scripts without warning about remote-code execution or system changes.

Medium
Category
Output Handling
Confidence
95% confidence
Finding

A missing CLI prompts installation through immediate execution of a downloaded script, without requiring user approval or explaining that installation can modify the local environment. The missing-command condition limits exposure, but an ordinary read-only MOCO request could still lead to system-changing setup if those commands are permitted.

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