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Security audit

Statsig

Security checks for vulnerabilities and agentic risk

Overview

The Statsig read workflow is coherent, but its setup instructions can trigger remote code execution without an explicit installation approval step.

Review the setup before installing. Use a reviewed CLI release and require approval before software or additional agent skills are installed. Connecting Statsig entrusts its API key and requested data to OOMOL; use narrowly scoped credentials. The live installers and hosted connector were not verified.

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 declared purpose concerns reading and searching Statsig data, but the code executes an Oomol-hosted installer. No relationship to Statsig is established in the supplied chunk, so this is an inconsistent resource and an undeclared execution capability rather than a demonstrated supporting implementation detail. The installer’s downstream actions 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

Piping a mutable remote script directly into bash executes its contents without prior review or independent integrity verification; the PowerShell alternative has the same issue. If the distribution endpoint or release process is compromised, the installer could run arbitrary commands with the invoking user's privileges, exposing local files and credentials despite Statsig tokens being managed server-side.

Content

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

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

Medium
Category
Output Handling
Confidence
95% confidence
Finding

The missing-CLI recovery path instructs the agent to execute a remote installer without explaining its local effects or requiring explicit installation approval. Although conditional setup reduces exposure, a Statsig read request could unexpectedly trigger local software installation and execution under the user's account.

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