Security audit

xurl

Security checks for vulnerabilities and agentic risk

Overview

The scanners classify this skill as benign with high confidence; the main note is that it can change or remove saved authentication settings, beyond the stated purpose of X operations and checking auth status.

Before installing, consider whether you need a skill that can change or remove saved authentication settings. The scan completed on the single inspected Markdown component, and the overall verdict is benign; that does not mean risk-free.

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

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
Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code

Findings (1)

Description-Behavior Mismatch

High

Category: MCP Tool Poisoning
Confidence: 90% confidence
Finding: Authentication status checks and app listing support the declared authenticated CLI workflow. However, changing authentication defaults and removing app registrations are state-changing authentication-management capabilities not disclosed by the description's reference to auth status. These are not X v2 API operations.
Content: No source excerpt is available for this finding.