Security audit

Marketplace Fee Calculator

Security checks for vulnerabilities and agentic risk

Overview

The visible skill is a marketplace fee calculator, but its main instruction file contains opaque non-text bytes that prevent a complete, reliable review.

Do not install this version unless the publisher replaces artifact/SKILL.md with clean, reviewable UTF-8 Markdown and the skill is rescanned. If restored, also verify fee rates against current marketplace seller documentation before using its financial output.

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

Findings (1)

other

Warning

Location: SKILL.md:162
Finding: Opaque and Malformed Content Prevents Complete Skill Review
Content: View full analysis
Remediation: View remediation

SkillSpector

Vulnerability Patterns

Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
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)

Ae2

Medium

Category: analysis-evasion
Confidence: 90% confidence
Finding: Artifact content does not match its filename extension
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.