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Security audit

Breweries

Security checks for vulnerabilities and agentic risk

Overview

This brewery lookup skill has a coherent purpose, but its install instructions ask users to clone and run executable code that is not included in the reviewed artifact.

Review this before installing. The brewery lookup idea is straightforward, but only the documentation was present here; the executable code users are told to run would come from a live GitHub clone. Install only from a pinned, reviewed commit or a package that includes the scripts and verifies their integrity.

A.I.G

Vulnerability Patterns
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • 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
  • 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)

T03 · Remote Payload Retrieval and Execution

Error
Location
README.md:5
Finding

Unpinned Remote Payload Retrieval and Execution

Content
View full analysis
Remediation
View remediation

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · README.md (reported line 56)May include surrounding context.

md
## API

Uses [Open Brewery DB API v1](https://api.openbrewerydb.org/v1/breweries). No authentication required.

## License

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
89% confidence
Finding

The instruction 'When user asks about breweries' plus the listed common patterns describes activation in a broad natural-language way, but does not define clear constraints or exclusions beyond a short 'Don't use for' list. Phrases like 'What breweries are in [state]?' and 'Where can I get craft beer in [city]?' overlap with ordinary conversation, which could cause unintended invocation in general chat contexts.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.