Back to skill

Security audit

Unthread

Security checks for vulnerabilities and agentic risk

Overview

The Unthread workflow requires approval for data changes, but its setup directs the agent to execute unverified downloaded code without asking first.

Review setup before installing. Install a verified, version-pinned oo CLI yourself and explicitly approve local installation changes. OOMOL mediates access to your connected Unthread account; retain the required confirmations for changes and deletion. Consider disabling the CLI's automatic skill synchronization using its documented control. The remote installers and hosted connector implementation were not verified. [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 (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

The supplied chunk performs remote script execution rather than Unthread data operations. No code or context establishes that the Oomol installer is a supporting dependency for Unthread. The installer's downstream actions cannot be determined from the supplied chunk.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command pipes a remotely fetched, unpinned script directly into Bash without an independent integrity or authenticity check. If the distribution endpoint or its publishing pipeline is compromised, the script could execute arbitrary code with the invoking user's privileges; HTTPS protects transport but does not prevent a compromised publisher from serving malicious content.

Content

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

The setup workflow executes remotely downloaded installation scripts without warning about local code execution and system changes.

Medium
Category
Output Handling
Confidence
93% confidence
Finding

The fallback setup instructs the agent to execute a downloaded shell or PowerShell installer without explicitly warning about local code execution or requiring approval for installation. Although triggered only when the CLI is missing, this expands a request to operate on Unthread data into running third-party code with the agent's local privileges.

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