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Security audit

Base64 Encode

Security checks for vulnerabilities and agentic risk

Overview

This skill only gives instructions for converting text between Base64, URL encoding, and HTML entities, with no evidence of hidden access or persistence.

Before installing, be aware that this skill may trigger on broad requests such as encoding or decoding text; otherwise it appears limited to local text transformation and does not show signs of hidden data access or system changes.

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
Confidence
94% confidence
Finding
The manifest description says to use the skill when the user asks to "encode, decode" or "escape special characters," which are generic phrases that overlap with many everyday or unrelated technical requests. It does not provide exclusions or tighter constraints to distinguish this encoder/decoder from other transformation tasks.

Static analysis

No suspicious patterns detected.