Back to skill

Security audit

VTEX

Security checks for vulnerabilities and agentic risk

Overview

The VTEX read workflow is coherent, but its automatic setup can execute changing remote code without a clear user checkpoint.

Review and install a verified CLI release yourself before enabling this skill, and require approval for later installation changes. Review or disable the CLI's automatic skill synchronization. Confirm the intended OOMOL account and VTEX connection, since OOMOL handles the integration. The listed VTEX operations are reads; the Review verdict concerns installation authority and undisclosed persistent effects. Remote installer behavior remains 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 installs software by executing externally retrieved code; it does not search or read VTEX data. Nothing in the supplied chunk establishes this installation as a supporting implementation detail for VTEX access. The downloaded script's contents and further effects are not shown.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The command streams a mutable remote script directly into Bash without a pinned version or independent integrity verification; the PowerShell alternative uses the same download-and-execute pattern. A compromised distribution endpoint or malicious installer update could execute arbitrary code with the agent's local privileges, despite the otherwise read-only VTEX workflow.

Content

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

The setup workflow instructs the agent to execute downloaded installation scripts without warning the user about local system changes.

Medium
Category
Output Handling
Confidence
95% confidence
Finding

When the CLI is missing, the skill directs the agent to install software without explicitly obtaining approval for local system changes. Authorization to read VTEX data does not necessarily authorize running an installer, which can modify files and execute code with the invoking user's privileges; the missing-CLI prerequisite limits exposure but does not remove this consent gap.

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