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Security audit

Base64

Security checks for vulnerabilities and agentic risk

Overview

The skill does not show harmful system access, but its Base64 reference content is mostly generic placeholder text that could mislead users.

Review this skill before installing because it is unlikely to provide reliable Base64 guidance despite its name and description. It does not appear to access credentials, use the network, or persist on the system, but users should not rely on it for Base64 implementation or security decisions until the content is corrected.

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
Vulnerability Patterns
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (3)

Credential Access

High
Category
Privilege Escalation
Confidence
70% confidence
Finding

Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Content

Scanner excerpt · scripts/script.sh (reported line 64)May include surrounding context.

sh
## Prerequisites
- Basic understanding of devtools concepts
- Required tools and access credentials
- System meeting minimum requirements

## Installation

Intent-Code Divergence

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The header comment claims the script should be used when working with Base64 in devtools contexts, but the implemented commands only provide broad generic operational advice. In a skill ecosystem, this kind of misrepresentation can mislead operators, reduce trust in provenance, and cause users to act on irrelevant guidance while believing it is authoritative Base64 documentation.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Medium
Category
Not specified by scanner
Confidence
98% confidence
Finding

The skill is presented as a Base64 reference tool, but nearly all implemented output is generic placeholder documentation unrelated to Base64. This is dangerous because it creates a trust mismatch: users may rely on the tool for security- or implementation-relevant Base64 guidance and instead receive misleading, nonfunctional content, which can cause operational mistakes and hide low-quality or deceptive packaging.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.