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Security audit

Video Translate

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward HeyGen video-translation guide with expected third-party API use and no hidden execution, persistence, or unrelated data access found.

Before installing, confirm you are comfortable using a HeyGen API key and sending the selected video URL or HeyGen video ID to HeyGen for processing. Avoid submitting confidential, regulated, or unauthorized media unless your HeyGen account and data-handling policies allow it, and treat the v4 advanced options as uncertain unless verified against HeyGen documentation.

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 Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (14)

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
91% confidence
Finding

The skill instructs users to provide a video URL or video ID for submission to HeyGen, but it does not clearly warn that video content, audio, and possibly personally identifiable or confidential information will be transmitted to a third-party service. In this context, the omission is security-relevant because the skill's primary purpose is external processing of user media, and users or agents may send sensitive content without informed consent or policy checks.

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 · SKILL.md (reported line 23)May include surrounding context.

All requests require the X-Api-Key header. Set the HEYGEN_API_KEY environment variable.

bash
curl -X POST "https://api.heygen.com/v2/video_translate" \
  -H "X-Api-Key: $HEYGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"video_url": "https://example.com/video.mp4", "output_language": "es-ES"}'

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 23)May include surrounding context.

All requests require the X-Api-Key header. Set the HEYGEN_API_KEY environment variable.

bash
curl -X POST "https://api.heygen.com/v2/video_translate" \
  -H "X-Api-Key: $HEYGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"video_url": "https://example.com/video.mp4", "output_language": "es-ES"}'

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 56)May include surrounding context.

All requests require the X-Api-Key header. Set the HEYGEN_API_KEY environment variable.

bash
curl -X POST "https://api.heygen.com/v2/video_translate" \
  -H "X-Api-Key: $HEYGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"video_url": "https://example.com/video.mp4", "output_language": "es-ES"}'

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 88)May include surrounding context.

All requests require the X-Api-Key header. Set the HEYGEN_API_KEY environment variable.

bash
curl -X POST "https://api.heygen.com/v2/video_translate" \
  -H "X-Api-Key: $HEYGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"video_url": "https://example.com/video.mp4", "output_language": "es-ES"}'

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 115)May include surrounding context.

All requests require the X-Api-Key header. Set the HEYGEN_API_KEY environment variable.

bash
curl -X POST "https://api.heygen.com/v2/video_translate" \
  -H "X-Api-Key: $HEYGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"video_url": "https://example.com/video.mp4", "output_language": "es-ES"}'

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 240)May include surrounding context.

All requests require the X-Api-Key header. Set the HEYGEN_API_KEY environment variable.

bash
curl -X POST "https://api.heygen.com/v2/video_translate" \
  -H "X-Api-Key: $HEYGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"video_url": "https://example.com/video.mp4", "output_language": "es-ES"}'

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 259)May include surrounding context.

All requests require the X-Api-Key header. Set the HEYGEN_API_KEY environment variable.

bash
curl -X POST "https://api.heygen.com/v2/video_translate" \
  -H "X-Api-Key: $HEYGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"video_url": "https://example.com/video.mp4", "output_language": "es-ES"}'

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 53)May include surrounding context.

Either video_url or video_id must be provided.

curl

bash
curl -X POST "https://api.heygen.com/v2/video_translate" \

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 88)May include surrounding context.

md
}

async function translateVideo(config: VideoTranslateRequest): Promise<string> {
  const response = await fetch("https://api.heygen.com/v2/video_translate", {
    method: "POST",
    headers: {
      "X-Api-Key": process.env.HEYGEN_API_KEY!,

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 114)May include surrounding context.

md
import os

def translate_video(config: dict) -> str:
    response = requests.post(
        "https://api.heygen.com/v2/video_translate",
        headers={
            "X-Api-Key": os.environ["HEYGEN_API_KEY"],

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 · SKILL.md (reported line 114)May include surrounding context.

md
import os

def translate_video(config: dict) -> str:
    response = requests.post(
        "https://api.heygen.com/v2/video_translate",
        headers={
            "X-Api-Key": os.environ["HEYGEN_API_KEY"],

Description-Behavior Mismatch

Medium
Category
Not specified by scanner
Confidence
87% confidence
Finding

The documentation expands the skill from a narrow v2 translation workflow into broader batch and advanced translation-control capabilities that are not clearly supported by the declared scope. Overstating capabilities is dangerous in an agent setting because it can cause the agent to construct requests or workflows beyond the authorized contract, increasing the chance of data mishandling, incorrect tool use, and security-control bypass through ambiguous instructions.

Content

No source excerpt is available for this finding.

Intent-Code Divergence

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The skill is declared and described as operating on HeyGen's /v2/video_translate endpoint, but the 'Advanced Options (v4 API)' section introduces parameters and capabilities outside that scope. This mismatch can mislead downstream agents or users into invoking unsupported options, causing unintended behavior, failed requests, or accidental use of broader features such as custom instructions, vocabulary, and callback-related controls without proper validation or review.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.