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Security audit

Unusual Whales API

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward guide for querying the Unusual Whales financial API, with its token use and external API destination disclosed.

Install only if you intend to use Unusual Whales and are comfortable providing UW_API_KEY to api.unusualwhales.com. Prefer the documented GET API path; if you use the optional local MCP command, verify the package source and pin a trusted version rather than running a mutable latest package.

A.I.G

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

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (10)

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 15)May include surrounding context.

md
- name: UW_API_KEY
        required: true
        description: Unusual Whales API token (paid API plan or trial) from https://unusualwhales.com/dashboard/api. Sent only to https://api.unusualwhales.com as a Bearer token.
    homepage: https://api.unusualwhales.com/docs
---

# Unusual Whales API Skill

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 24)May include surrounding context.

md
- name: UW_API_KEY
        required: true
        description: Unusual Whales API token (paid API plan or trial) from https://unusualwhales.com/dashboard/api. Sent only to https://api.unusualwhales.com as a Bearer token.
    homepage: https://api.unusualwhales.com/docs
---

# Unusual Whales API Skill

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 149)May include surrounding context.

md
- name: UW_API_KEY
        required: true
        description: Unusual Whales API token (paid API plan or trial) from https://unusualwhales.com/dashboard/api. Sent only to https://api.unusualwhales.com as a Bearer token.
    homepage: https://api.unusualwhales.com/docs
---

# Unusual Whales API Skill

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 170)May include surrounding context.

md
- name: UW_API_KEY
        required: true
        description: Unusual Whales API token (paid API plan or trial) from https://unusualwhales.com/dashboard/api. Sent only to https://api.unusualwhales.com as a Bearer token.
    homepage: https://api.unusualwhales.com/docs
---

# Unusual Whales API Skill

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 192)May include surrounding context.

md
- name: UW_API_KEY
        required: true
        description: Unusual Whales API token (paid API plan or trial) from https://unusualwhales.com/dashboard/api. Sent only to https://api.unusualwhales.com as a Bearer token.
    homepage: https://api.unusualwhales.com/docs
---

# Unusual Whales API Skill

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 208)May include surrounding context.

md
- name: UW_API_KEY
        required: true
        description: Unusual Whales API token (paid API plan or trial) from https://unusualwhales.com/dashboard/api. Sent only to https://api.unusualwhales.com as a Bearer token.
    homepage: https://api.unusualwhales.com/docs
---

# Unusual Whales API Skill

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 235)May include surrounding context.

md
- name: UW_API_KEY
        required: true
        description: Unusual Whales API token (paid API plan or trial) from https://unusualwhales.com/dashboard/api. Sent only to https://api.unusualwhales.com as a Bearer token.
    homepage: https://api.unusualwhales.com/docs
---

# Unusual Whales API Skill

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 251)May include surrounding context.

md
- name: UW_API_KEY
        required: true
        description: Unusual Whales API token (paid API plan or trial) from https://unusualwhales.com/dashboard/api. Sent only to https://api.unusualwhales.com as a Bearer token.
    homepage: https://api.unusualwhales.com/docs
---

# Unusual Whales API Skill

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 266)May include surrounding context.

md
- name: UW_API_KEY
        required: true
        description: Unusual Whales API token (paid API plan or trial) from https://unusualwhales.com/dashboard/api. Sent only to https://api.unusualwhales.com as a Bearer token.
    homepage: https://api.unusualwhales.com/docs
---

# Unusual Whales API Skill

Rp1

Medium
Category
MCP Rug Pull
Confidence
92% confidence
Finding

The skill instructs users to run an unpinned package via npx -y @unusualwhales/mcp, which fetches and executes the latest published code at runtime. If the package is compromised, typosquatted, or updated with malicious behavior, it could execute arbitrary code and access the UW_API_KEY environment variable on the local machine.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.