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Security audit

LLM Wiki — Build a Compounding Knowledge Base with LLMs

Security checks for vulnerabilities and agentic risk

Overview

The skill is a coherent Markdown/Obsidian knowledge-base helper with disclosed local file maintenance and bounded optional web/media use.

Install this if you want an agent to maintain a long-lived Markdown/Obsidian wiki. Expect it to read and edit files in the target Knowledge vault, maintain indexes and logs, and optionally use web sources or localize images when the task calls for it. Keep private vaults scoped carefully and confirm before bulk renames, migrations, or attachment downloads.

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
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (5)

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 299)May include surrounding context.

md
y_wiki.py` as `scripts/verify_wiki.py` inside the skill package, together with `SKILL.md`; the root-level wrapper is only a convenience entry point for this vau

Undeclared Tool Scope

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.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The instructions require English as the default for directory and file names, including guidance to keep specific English filenames and prefer readable English names whenever possible. This is a natural-language locale policy constraint that can override user language preferences without an explicit opt-in, which matches the policy-violation criteria.

Content

No source excerpt is available for this finding.

Context-Inappropriate Capability

Medium
Category
Not specified by scanner
Confidence
90% confidence
Finding

The skill authorizes external search when certain conditions are met, which expands the agent’s trust boundary from the local knowledge base to the open web. That can introduce prompt-injection content, untrusted facts, and unintended data exposure if queries derived from private wiki contents are sent to external services.

Content

No source excerpt is available for this finding.

Context-Inappropriate Capability

Low
Category
Not specified by scanner
Confidence
81% confidence
Finding

The manifest describes organizing and auditing a Markdown knowledge wiki, but these lines add a capability to download external images and rewrite references into localized attachments. That is a network-fetching and asset-ingestion capability not clearly implied by the skill's stated purpose of maintaining textual knowledge pages.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.