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Security audit

musicbrainz-mcp

Security checks for vulnerabilities and agentic risk

Overview

This skill provides MusicBrainz lookup tools and clearly gates account-changing actions behind OAuth and user confirmation.

Install this if you want an agent to query MusicBrainz metadata and cover art. Only configure OAuth if you intend to let it tag, rate, or edit your own MusicBrainz collections, and review the preview before confirming any write. Use the full view when image URL relations matter.

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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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 (1)

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
75% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 37)May include surrounding context.

md
`musicbrainz_lookup`, `musicbrainz_search`, `musicbrainz_browse` and
`musicbrainz_resolve` take `view: "compact" | "full"`, and **`compact` is the
default** — you get the slim shape without asking, and an unrecognised value
falls back to it rather than erroring.

**Compact here is media stripping, not a field projection.** It removes keys

Static analysis

No suspicious patterns detected.