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Security audit

file-upload

Security checks for vulnerabilities and agentic risk

Overview

This skill does what it says: uploads user-selected media to Flyelep and returns public URLs, with the main risk being that those URLs are permanent and public.

Install only if you intend to upload selected local media to Flyelep. Do not upload private, regulated, or sensitive files unless you are comfortable with a permanent public direct URL being created, and provide the Flyelep secretKey only at runtime rather than storing it in files or configs.

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
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (3)

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The skill explicitly states that uploads return permanent publicly accessible URLs, but the top-level description does not clearly warn users about that privacy consequence before they provide local media. This can cause users to unintentionally expose sensitive images, videos, or audio to the public internet, especially because the skill is designed to upload local files rather than already-public URLs.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
92% confidence
Finding

The skill is explicitly designed to transmit local files to an external third-party service, which is a real data egress behavior. In this context that behavior is expected, but it is still security-relevant because users may upload sensitive local media and the service returns permanent public links, increasing exposure beyond simple API processing.

Content

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

示例 2：上传单张图片（macOS/Linux）

bash
curl -X POST "https://www.flyelep.cn/prod-api/poster-design/api/v1/file/upload" -H "secretKey: 你的密钥" --max-time 120 -F "file=@./product.png"

示例 3：上传视频（超时时间放宽）

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
97% confidence
Finding

The entire skill description and operating instructions are written only in Chinese, with no indication that the user can choose another language or locale. This can violate language-choice policy when a skill implicitly constrains communication to a specific language without opt-in or justification.

Content

No source excerpt is available for this finding.