Back to skill

Security audit

API Ninjas

Security checks for vulnerabilities and agentic risk

Overview

The data lookups match the stated purpose, but automatic setup executes unreviewed remote code and can introduce broader changes to agent skills.

Review the setup behavior before installing. Prefer a verified, preinstalled CLI with automatic skill synchronization disabled, and approve installation and account connection separately. OOMOL mediates the lookups and credentials. The remote installers and backend implementation remain unverified; the inspected skill does 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 (5)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
99% confidence
Finding

The supplied command does not search or read API Ninjas data. It executes an installer from an unrelated domain, with no demonstrated connection to the declared functionality. The downloaded script's further behavior cannot be determined from this chunk.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
94% confidence
Finding

The supplied command performs login rather than an API Ninjas search or data read. Authentication could be a supporting implementation detail if linked to the declared service, but the supplied chunk establishes no such link and contains no API Ninjas functionality.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
99% confidence
Finding

The curl-to-bash command executes a mutable remote script with the agent process's privileges, without an independently verified integrity check or review step; the PowerShell alternative has the same problem. Compromise of the distribution endpoint or installer supply chain could enable local data theft or host modification, although the supplied content does not establish that the endpoint is malicious.

Content

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

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

Medium
Category
Output Handling
Confidence
95% confidence
Finding

On a missing-CLI error, the workflow directs the agent to execute a remote installer without explicitly obtaining approval for local software installation or explaining its system effects. This extends a data-reading task into host modification; the conditional trigger reduces frequency but does not establish user consent.

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