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Security audit

MH openai-whisper-api

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward audio transcription wrapper that sends a user-selected audio file to OpenAI and saves the transcript locally.

Install only if you are comfortable sending the selected audio files to OpenAI for transcription. Avoid using it for recordings that contain confidential, regulated, or non-consented speech unless that use is allowed for your situation and account settings.

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
  • 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 (3)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
94% confidence
Finding

The skill declares shell-based execution (scripts/transcribe.sh) but does not define any tool scope such as permissions or allowed-tools. In agent environments, undeclared shell capability weakens policy enforcement and can let the skill execute commands with broader access than users or hosts expect.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
97% confidence
Finding

The skill instructs users to transcribe local audio through OpenAI's /v1/audio/transcriptions endpoint but does not clearly warn that the audio content is uploaded to a third-party remote service. This omission can cause unintentional disclosure of sensitive recordings, especially because audio often contains personal, confidential, or regulated data.

Content

No source excerpt is available for this finding.

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/transcribe.sh (reported line 75)May include surrounding context.

sh
mkdir -p "$(dirname "$out")"

curl -sS https://api.openai.com/v1/audio/transcriptions \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -H "Accept: application/json" \
  -F "file=@${in}" \

Static analysis

No suspicious patterns detected.