ClawHub
Back to skill

Security audit

memegen-rs

Security checks for vulnerabilities and agentic risk

Overview

This skill is a simple memegen.rs URL builder with no local code execution or persistence, though meme captions and custom image URLs are exposed to that external service.

Install only if you are comfortable sending meme caption text and any custom background image URL to memegen.rs. Avoid using private image URLs, secrets, internal links, personal data, or sensitive business text in captions.

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
  • 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 (2)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
92% confidence
Finding

The invocation description is broad enough to activate on generic requests like 'caption an image' or 'make a meme,' which can cause the agent to route ordinary user content to this external service without clear user intent to use memegen.rs specifically. In context, this is more dangerous because the skill transmits caption text and may also reference arbitrary background image URLs, increasing the chance of unintended third-party disclosure or unnecessary external calls.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The skill does not warn users that caption text and optional background image URLs are sent to an external third-party service, which can expose sensitive text, private image locations, or internal URLs. This is especially relevant here because the core functionality is entirely URL-based, making exfiltration easy and likely to be overlooked by users and calling agents.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.