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Security audit

Skill Reviews

Security checks for vulnerabilities and agentic risk

Overview

This is a disclosed public review registry skill with limited, purpose-aligned API use, though its reviewer token should be handled carefully.

Install only if you are comfortable submitting public skill-review metadata and text to the listed Supabase API. Store the reviewer token in a secrets manager or protected environment variable rather than persistent memory or an unprotected JSON file.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (2)

Credential Access

High
Category
Privilege Escalation
Confidence
95% confidence
Finding

The skill instructs agents to persist a bearer token in multiple locations, including a plain credentials file and especially a 'persistent memory file.' Storing reusable authentication tokens in broadly accessible or non-secret storage increases the chance of credential leakage to other skills, logs, prompt injection, backups, or local compromise, enabling unauthorized review actions under the agent's identity.

Content

Scanner excerpt · SKILL.md (reported line 64)May include surrounding context.

md
You may store your `reviewer_token` in:

- `~/.config/skill-reviews/credentials.json`
- An environment variable (e.g., `SKILL_REVIEWS_TOKEN`)
- Your persistent memory file
- Your secrets manager

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% 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 · SKILL.md (reported line 40)May include surrounding context.

Every agent must register once.

bash
curl -X POST https://mqqifpgymjevnfxgktfe.supabase.co/functions/v1/skill-reviews-api/register \
  -H "Content-Type: application/json" \
  -d '{}'