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Security audit

copyku

Security checks for vulnerabilities and agentic risk

Overview

This is a copywriting helper skill with no code execution, data access, persistence, or hidden system behavior, though users should be careful with broad triggers and regulated health claims.

Before installing, treat Copyku as a text-generation assistant for marketing drafts. Review generated claims before publishing, especially for health, finance, legal, or other regulated products, and use explicit prompts if you do not want broad keyword detection to shape the output.

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
Vulnerability Patterns
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • 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 (4)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
88% confidence
Finding

The README says users can 'langsung sebutkan kebutuhan' and gives examples in the form 'copyku, ...', but it does not clearly define whether any phrase containing 'copyku' plus a request will activate the skill or what inputs should not trigger it. This ambiguity can cause unintended invocations because the trigger scope and exclusion conditions are not explicitly constrained.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
88% confidence
Finding

The skill explicitly supports health-industry marketing templates and claims like 'klinis, teruji, dokter rekomendasikan' without prominent warnings about regulated claims, jurisdictional compliance, or review requirements. In a copywriting skill, this increases the risk that users generate promotional text that violates medical advertising rules or makes unsafe, misleading health claims.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The skill says users can activate it by simply stating phrases like "caption produk skincare," "headline kursus online," or "iklan makanan ringan." These are common everyday content requests and the document does not define narrower invocation constraints or exclusion conditions, which could cause unintended activation.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The document states that Copyku automatically detects broad keywords such as "caption," "headline," "story," "jual," and "bulk" and maps them to behaviors. These terms are common in normal conversation, and the skill does not specify when detection should apply versus when it should be ignored.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.