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Security audit

Sound FX

Security checks for vulnerabilities and agentic risk

Overview

This skill coherently generates sound effects through ElevenLabs, with the external API call and API-key requirement disclosed and aligned with its purpose.

Install only if you are comfortable sending sound-effect prompts to ElevenLabs under your own API key. Avoid putting secrets or sensitive personal details in prompts, protect the API key, and choose output paths carefully because generated files can overwrite existing files at that path.

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
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (5)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
91% confidence
Finding

The skill documents shell execution and use of environment credentials but does not declare any explicit tool scope or allowed-tools boundary. That omission can cause the agent to invoke shell/network-capable behavior without clear least-privilege constraints, increasing the chance of unintended command execution or secret exposure in broader runtimes.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
70% 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 · scripts/generate_sfx.sh (reported line 65)May include surrounding context.

sh
PY
)

HTTP_CODE=$(curl -sS -o "$OUT" -w "%{http_code}" \
  -X POST "https://api.elevenlabs.io/v1/sound-generation?output_format=${FORMAT}" \
  -H "xi-api-key: ${API_KEY}" \
  -H "Content-Type: application/json" \

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% 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 33)May include surrounding context.

md
)

HTTP_CODE=$(curl -sS -o "$OUT" -w "%{http_code}" \
  -X POST "https://api.elevenlabs.io/v1/sound-generation?output_format=${FORMAT}" \
  -H "xi-api-key: ${API_KEY}" \
  -H "Content-Type: application/json" \
  -d "$PAYLOAD")

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% 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 · scripts/generate_sfx.sh (reported line 66)May include surrounding context.

sh
)

HTTP_CODE=$(curl -sS -o "$OUT" -w "%{http_code}" \
  -X POST "https://api.elevenlabs.io/v1/sound-generation?output_format=${FORMAT}" \
  -H "xi-api-key: ${API_KEY}" \
  -H "Content-Type: application/json" \
  -d "$PAYLOAD")

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
84% confidence
Finding

The skill instructs users to configure API credentials and sends user-provided prompts to an external service, but it does not warn that prompt content and metadata will leave the local environment. This can lead to accidental transmission of sensitive content or misuse of API keys by users who do not realize a third party is involved.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.