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Security audit

GrabGrab

Security checks for vulnerabilities and agentic risk

Overview

The skill uses the disclosed GrabGrab service to download selected public videos, with no evidence of hidden access or unrelated data collection.

Use public video links you are comfortable sharing with GrabGrab, and remove unnecessary tracking or sensitive query parameters. The optional CLI is not included in this package, and the service's live behavior was not independently verified.

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
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

The workflow sends user-supplied video URLs to a third-party service without a user-facing privacy disclosure.

Medium
Category
Output Handling
Confidence
90% confidence
Finding

The workflow sends the user's selected video URL to GrabGrab without requiring a user-facing disclosure that an external service will receive it. This can expose viewing interests or identifiers embedded in URL query parameters, although the restriction to public videos and the explicit identification of GrabGrab in the skill substantially reduce the concern. This is a limited privacy-transparency issue, not evidence of malicious exfiltration.

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 28)May include surrounding context.

Prefer the remote MCP tool download_video when this assistant is connected to https://www.grabgrab.fun/api/mcp. Otherwise POST the public API:

bash
curl -s -X POST "https://www.grabgrab.fun/api/download" \
  -H "Content-Type: application/json" \
  -d '{"url": "<VIDEO_URL>", "videoQuality": "1080"}'

Static analysis

No suspicious patterns detected.