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Security audit

StealthGPT

Security checks for vulnerabilities and agentic risk

Overview

Review is recommended because setup executes an unverified download, and the required CLI has broader persistent effects than this skill explains.

Review and verify the CLI installation before allowing setup. If you do not want it to synchronize skills across agent homes, configure OO_SKILLS_SYNC_DISABLED=1 before invoking it, as documented in the [CLI controls](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md#environment-variables). Submit only text you intend OOMOL and StealthGPT to process. The bundled instructions were fully reviewed, but the remote installers and live connector code 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 command performs remote code execution for an apparent Oomol CLI installation, while the description promises StealthGPT data operations. Nothing in the chunk establishes this installation as a supporting dependency for StealthGPT. The downloaded script's contents and further effects are not provided.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The setup command streams a mutable remote script directly into Bash without verifying its integrity or reviewing it; the PowerShell alternative has the same execution pattern. A compromised installer endpoint or distribution pipeline could execute arbitrary code with the agent's local privileges and access local credentials or files. Conditional execution only when the CLI is missing reduces exposure frequency, not the consequences, although an enforced Bash(oo *) tool restriction may block these installation commands.

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

Text-processing actions lack a warning that submitted text is transmitted to third-party services.

Medium
Category
Output Handling
Confidence
91% confidence
Finding

The workflow instructs the agent to execute connector actions, including submitting text for AI detection or rewriting, without warning that the supplied content is sent through OOMOL to StealthGPT. Labeling untagged actions as safe to run directly overlooks the privacy impact of detect_ai_text, which can disclose user content even though it does not change account state.

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 79)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