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Security audit

github-image-hosting

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward GitHub image-hosting helper, with public upload risks disclosed and no hidden code or persistence found.

Install only if you are comfortable with an agent uploading selected images to a public third-party host and posting the resulting URL to GitHub. Review screenshots before upload, especially for secrets, customer data, private repositories, or internal systems.

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
96% confidence
Finding

The trigger language is broad enough to activate on generic requests like "attach an image" or "any task producing an image for GitHub," which can cause the skill to run in situations the user did not explicitly intend. In this skill, unintended activation is more dangerous because it can lead to uploading screenshots or generated images to a public third-party host, potentially exposing sensitive internal or customer data.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.