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Security audit

Random Image Placeholder

Security checks for vulnerabilities and agentic risk

Overview

This skill is a simple placeholder-image helper with disclosed Picsum URL generation and optional user-requested downloads.

Before installing, note that the skill may be used for generic placeholder-image requests and can contact picsum.photos. Keep URL-only use as the default, and only ask it to download images when you want files written locally.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (1)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
89% confidence
Finding

The trigger section says to use the skill whenever the user asks for placeholder images, temporary image URLs, or for UI mockups/docs/test fixtures. These conditions are broad and lack exclusion criteria or negative examples, which could cause the skill to activate for many generic image-related requests beyond Picsum-specific use cases.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.