Security audit

Xin

Security checks for vulnerabilities and agentic risk

Overview

This is a simple English tutoring skill with disclosed lesson, quiz, onboarding, and scheduling behavior and no evidence of hidden or unsafe actions.

Before installing, be aware this skill is framed around American English and scheduled learning content. It appears low risk from the inspected artifact, but users who need British, Australian, or another English variant should check whether the onboarding preferences support that.

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

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
Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep

Findings (1)

Natural-Language Policy Violations

Medium

Category: Not specified by scanner
Confidence: 93% confidence
Finding: The description states this is a personalized 'American English tutor,' which imposes a specific language variant by default. The file does not indicate that users may choose another English locale or that the restriction is required for a documented reason.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.