Security audit

Piper Tts Engine Free

Security checks across malware telemetry and agentic risk

Overview

This local text-to-speech skill is mostly understandable, but it asks agents to run missing relative scripts and has broad triggers that could cause command execution for unrelated file tasks.

Review carefully before installing. Use it only for explicit text-to-speech tasks, verify any script path before execution, and do not let an agent run scripts/setup-piper.sh or scripts/piper-speak.sh from an unrelated workspace unless you know exactly what those files contain.

SkillSpector

By NVIDIA

Vulnerability Patterns

Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
Behavioral ASTexec() Call, eval() Call, Dynamic Import
Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access

Findings (2)

Vague Triggers

High

Confidence: 86% confidence
Finding: The trigger conditions are broad and unrelated to the actual TTS purpose, which can cause the agent to invoke this skill for general file handling or document conversion tasks. In a skill with exec permission, misrouting increases the chance of unnecessary command execution, unintended installation steps, or user confusion around what code is being run.

Missing User Warnings

Medium

Confidence: 90% confidence
Finding: The skill instructs users or agents to run installation and synthesis scripts using exec, but provides no warning about reviewing script contents, package provenance, filesystem effects, or network downloads. In an agentic environment, that omission is risky because it normalizes executing local scripts and package installers without user consent or safety checks.

VirusTotal

VirusTotal findings are pending for this skill version.

View on VirusTotal

Static analysis

No suspicious patterns detected.