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Security audit

PromptLayer

Security checks for vulnerabilities and agentic risk

Overview

The PromptLayer reading workflow is coherent, but setup directs the agent to execute unverified downloaded software without a clear user approval step.

Review and approve CLI installation separately, inspect and verify the installer, and check its automatic agent-skill installation behavior. Connect only the intended PromptLayer account and consider whether its prompts and logs may be accessed through OOMOL. The Review verdict concerns insufficiently controlled setup; the artifacts do not establish malicious intent.

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 script execution, not PromptLayer searching or reading. Nothing in the supplied chunk establishes the Oomol installer as a supporting dependency for PromptLayer, so this is a material mismatch rather than a demonstrated implementation detail. The downloaded script's further behavior 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

The command pipes a mutable remote script directly into Bash without verifying its contents, version, or integrity; the PowerShell alternative has the same execution pattern. If the distribution endpoint or installer supply chain is compromised, attacker-controlled code could execute with the agent process's privileges and access local data or credentials. HTTPS and the legitimate dependency context reduce some risks but do not provide artifact verification.

Content

Scanner excerpt · SKILL.md (reported line 60)May include surrounding context.

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

Medium
Category
Output Handling
Confidence
95% confidence
Finding

When the CLI is missing, the workflow directs the agent to install software without explicitly obtaining approval for local code execution and system changes. Although conditional setup is legitimate, a request to read PromptLayer data does not necessarily authorize installing software 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 81)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