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Security audit

etsy-listing-optimizer

Security checks for vulnerabilities and agentic risk

Overview

Review before use: the pricing script ignores your supplied costs and generates substantially inflated prices.

Have the pricing calculation corrected and independently check every variant against its actual cost before publishing. The optional Windows application is unnecessary for the bundled workflow and requires a separate trust decision.

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 Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • 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
Findings (3)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
98% confidence
Finding

If the static analyzer's implementation claims are accurate, interpreting a 55% markup as a 55× multiplier creates a pricing-integrity defect that could produce substantially incorrect recommendations and lost sales. Ordinal multipliers could also misprice variants, although absent title/tag rewriting in the script is not independently suspicious because the assistant can perform that work. The script was not supplied for verification, and the seller-only publishing rule reduces direct impact.

Content

No source excerpt is available for this finding.

Skill declares no tool scope ('permissions' or 'allowed-tools') but code capabilities were detected: file_write.

Medium
Category
MCP Least Privilege
Confidence
70% confidence
Finding

Without declared permissions the skill's intent is opaque and cannot be validated.

Content

No source excerpt is available for this finding.

The documented 55% markup is implemented as a 55× price multiplier.

Medium
Category
Excessive Agency
Confidence
99% confidence
Finding

The documented markup_pct of 55 is used as a direct multiplier, producing a basic-tier price of $467.50 instead of $13.18 for an $8.50 cost with a 55% markup. Because the skill generates seller-facing price recommendations, this integrity defect could cause severe overpricing and lost sales if the seller uses the output; the script does not publish listings itself, which limits the immediate impact.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.