Back to skill

Security audit

SeedanceVideo

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward Seedance/Ark video-generation helper that openly sends prompts and image URLs to Volcengine and shows no hidden persistence or local data access.

Install this only if you intend to use ByteDance/Volcengine Ark for video generation. Prompts, image URLs, request metadata, and the resulting task data are sent to that external service, so avoid confidential, personal, internal-only, or non-public image inputs unless you have approval to share them. Keep ARK_API_KEY in an environment variable and do not paste it into prompts or shared files.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (7)

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

This markdown file presents all contributor instructions in Chinese and does not offer an English alternative, language selection, or any opt-in mechanism. Under the policy rule for natural-language violations, forcing a specific language without user choice can be a locale-policy issue unless the restriction is clearly documented and justified.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
91% confidence
Finding

The trigger conditions are broad enough to activate this skill for generic video-generation requests, which can cause the agent to route users into an external third-party workflow unexpectedly. That increases the chance of sending prompts or image URLs to Ark when the user did not specifically intend to use this provider or consent to external transmission.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The skill instructs users to send prompts and image URLs to a third-party API but does not warn that user content will leave the local environment and be processed by ByteDance/Volcengine. In a skill that handles creative prompts and potentially user-supplied images, omission of a privacy notice can lead to accidental disclosure of sensitive data.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
91% confidence
Finding

This example performs an authenticated POST to an external service and transmits user-provided prompt text and an image URL to a third-party API. In the context of an agent skill, external transmission is expected for the feature, but it is still security-relevant because it can expose user content and metadata if the user is not clearly informed or if routing occurs too broadly.

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

bash
# 1. 创建图生视频任务
resp=$(curl -s -X POST 'https://ark.cn-beijing.volces.com/api/v3/contents/generations/tasks' \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{

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 81)May include surrounding context.

md
echo "Task ID: $task_id"

# 2. 轮询任务状态
curl -s "https://ark.cn-beijing.volces.com/api/v3/contents/generations/tasks/$task_id" \
  -H "Authorization: Bearer $ARK_API_KEY"

# 3. 当 status 为 succeeded 时,从响应的 content 中取 video_url

External Transmission

Medium
Category
Data Exfiltration
Confidence
90% confidence
Finding

This is another authenticated external POST example that sends prompts and image URLs to Ark, carrying the same privacy and data-sharing risk as the earlier task-creation example. Because this is sample code users may copy directly, it can normalize external transmission without adequate warning about third-party processing.

Content

Scanner excerpt · SKILL.md (reported line 155)May include surrounding context.

图生视频(你提供的写法)

bash
curl -X POST https://ark.cn-beijing.volces.com/api/v3/contents/generations/tasks \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ARK_API_KEY" \
  -d '{

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
87% confidence
Finding

The operational instructions are presented entirely in Chinese, while the manifest description is partly English, and there is no indication that the user can choose their preferred language. This can violate language/locale policy where skills should not impose a specific language without opt-in or documented justification.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.