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Security audit

Elevenlabs Tts

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward ElevenLabs text-to-speech helper that uses the expected ElevenLabs API key and network calls for voice listing and audio generation.

Install only if you intend to use ElevenLabs cloud TTS. Provide an ElevenLabs API key through the environment, do not put secrets in prompts or files, and avoid converting confidential, regulated, or proprietary text unless you are comfortable sending it to ElevenLabs. Choose an explicit output path because the script writes the generated audio there.

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
  • Taint TrackingDirect Taint Flow, Variable-Mediated Taint Flow, Credential Exfiltration Chain
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (8)

Tainted flow: 'req' from os.environ.get (line 6, credential/environment) → urllib.request.urlopen (network output)

Critical
Category
Data Flow
Confidence
90% confidence
Finding

Credentials or environment variables flow to a network sink. This is a high-confidence indicator of credential exfiltration.

Content

Scanner excerpt · scripts/list_voices.py (reported line 8)May include surrounding context.

python
print('Missing ELEVENLABS_API_KEY', file=sys.stderr); sys.exit(2)
req=urllib.request.Request('https://api.elevenlabs.io/v1/voices',headers={'xi-api-key':KEY,'User-Agent':'openclaw-elevenlabs-skill/1'})
try:
    with urllib.request.urlopen(req,timeout=30) as r:
        data=json.loads(r.read().decode('utf-8'))
except urllib.error.HTTPError as e:
    print(f'HTTP {e.code}: '+e.read().decode('utf-8','ignore')[:1000], file=sys.stderr); sys.exit(1)

Tainted flow: 'req' from os.environ.get (line 11, credential/environment) → urllib.request.urlopen (network output)

Critical
Category
Data Flow
Confidence
90% confidence
Finding

Credentials or environment variables flow to a network sink. This is a high-confidence indicator of credential exfiltration.

Content

Scanner excerpt · scripts/tts_stream_http.py (reported line 12)May include surrounding context.

python
def request_json(path, key):
    req=urllib.request.Request(API+path,headers={'xi-api-key':key,'User-Agent':'openclaw-elevenlabs-skill/1'})
    with urllib.request.urlopen(req,timeout=30) as r:
        return json.loads(r.read().decode('utf-8'))

def resolve_voice_id(key, voice_id, voice_name):

Tainted flow: 'req' from os.environ.get (line 11, credential/environment) → urllib.request.urlopen (network output)

Critical
Category
Data Flow
Confidence
90% confidence
Finding

Credentials or environment variables flow to a network sink. This is a high-confidence indicator of credential exfiltration.

Content

Scanner excerpt · scripts/tts_stream_http.py (reported line 68)May include surrounding context.

python
out=Path(args.out).expanduser(); out.parent.mkdir(parents=True,exist_ok=True)
start=time.perf_counter(); first=None; chunks=0; total=0
try:
    with urllib.request.urlopen(req,timeout=120) as r, out.open('wb') as f:
        status=getattr(r,'status',None)
        while True:
            chunk=r.read(8192)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
92% confidence
Finding

The skill instructs use of environment variables and live network access to the ElevenLabs API, but the manifest declares no explicit tool scope such as permissions or allowed-tools. That creates a policy gap where an agent may invoke env/network capabilities without clear least-privilege boundaries or user visibility, increasing the chance of unintended secret access or outbound requests.

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/list_voices.py (reported line 6)May include surrounding context.

python
import argparse, json, os, sys, time, urllib.parse, urllib.request, urllib.error
from pathlib import Path

API='https://api.elevenlabs.io/v1'

def die(msg, code=1):
    print(msg, file=sys.stderr); sys.exit(code)

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/tts_stream_http.py (reported line 5)May include surrounding context.

python
import argparse, json, os, sys, time, urllib.parse, urllib.request, urllib.error
from pathlib import Path

API='https://api.elevenlabs.io/v1'

def die(msg, code=1):
    print(msg, file=sys.stderr); sys.exit(code)

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
92% confidence
Finding

The script transmits arbitrary user-provided text to a third-party TTS provider without any explicit in-script notice or consent checkpoint. This can create a privacy and data-handling risk if callers pass sensitive, proprietary, or regulated content assuming processing is local.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
81% confidence
Finding

The script creates parent directories and writes streamed audio bytes to the path given by --out. While file output is part of the tool's function, there is no explicit warning, comment, or user-facing notice that it will create directories and overwrite or create a local file at the specified path.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.