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Security audit

Xurl

Security checks for vulnerabilities and agentic risk

Overview

The scanners classify this skill as benign overall, while noting that it can change or remove authentication settings beyond the capabilities described to users.

Before installing, consider whether you need a skill that can change authentication defaults or remove registered apps, and check that these actions fit your intended use. The scan covered the listed skill component completely, but a benign verdict 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 align with the description, and listing apps is supporting functionality. However, changing authentication defaults and removing registered apps modify authentication configuration, a capability not declared by authentication status checks or raw X v2 API calls.

Content

No source excerpt is available for this finding.