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Security audit

brief-master

Security checks for vulnerabilities and agentic risk

Overview

The scanners report no AIG findings and assess the skill as benign, with the main caveat that Skillspector flagged two purpose-related items and its review was partial.

The verdict is benign, but benign does not mean risk-free. Consider the tool-scope note before installing. Skillspector inspected all listed components, but its analysis was marked partial because a local path-like reference could not be resolved, so the evidence is incomplete.

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
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

Credential Access

High
Category
Privilege Escalation
Confidence
70% confidence
Finding

Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Content

Scanner excerpt · SKILL.md (reported line 77)May include surrounding context.

md
## Tooling scope

This is an instruction-led drafting skill. It writes the requested brief; it does not run the commands in that brief, schedule jobs, access credentials or publish anything. `scripts/validate_skill_repo.py` is optional maintainer packaging validation, not the brief-generation implementation. Run it only when maintaining this skill repository. Example phrases are complete task examples, not keyword-only activation rules.

Skill declares no tool scope ('permissions' or 'allowed-tools') but code capabilities were detected: file_read.

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.