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prompt-engineering — agentic threat model

8.7AIVSS 8.7 · High

This agent presents a high integrity risk because it has direct write access to system prompts and agent-instruction files, meaning a compromise or prompt injection could permanently alter the behavior of developer workflows. The use of iterative subagents further expands the local execution attack surface.

OWASP AIVSS score rationale

AIVSS = (CVSS_Base + AARS) × Mitigation_Factor, where AARS = (10 − CVSS_Base) × (Factor_Sum / 10) × ThM
CVSS base 7.8AARS uplift 0.95Factor sum 4.3/10Threat ×1.0Mitigation ×1.0
Autonomy of Action
0.40
Goal-Driven Planning
0.50
Self-Modification
0.80
Dynamic Tool Use
0.30
Persistent Memory
0.10
Contextual Awareness
0.40
Dynamic Identity
0.10
Multi-Agent Interactions
0.60
Non-Determinism
0.70
Opacity & Reflexivity
0.40

Scored with the canonical OWASP AIVSS formula (AIVSS calculator reference); agentic risk factors estimated from the agent’s described capabilities.

MAESTRO 7-layer threat model

Per-layer threats for this agent. Layers tagged “not certain from listing” are general, caveated commentary where the public description didn’t pin that layer.

L1 · Foundation Models⚠ not certain from listing

Not certain from the listing — likely relies on Anthropic Claude models via Claude Code. Threats include indirect prompt injection where analyzing a malicious prompt file reprograms the model to output backdoored instructions.

L2 · Data Operations⚠ not certain from listing

Not certain from the listing — reads local prompt files and system instructions. Threats include unauthorized reading of sensitive configuration files or exfiltration of proprietary prompt templates.

L3 · Agent Frameworks✓ mapped

Integrates directly with Claude Code as a plugin with file-writing capabilities. Threats include insecure tool usage where the file-write capability is abused to overwrite critical system files or executable scripts instead of just prompt files.

L4 · Deployment & Infrastructure⚠ not certain from listing

Not certain from the listing — runs locally within the user's Claude Code CLI environment. Threats include local privilege escalation if the host environment lacks sandboxing, allowing malicious prompt rewrites to execute local commands.

L5 · Evaluation & Observability⚠ not certain from listing

Not certain from the listing — provides 'system-prompt evaluation' but lacks explicit security guardrails or audit logging of modified files. Threats include blind spots where malicious prompt modifications go unnoticed.

L6 · Security & Compliance (cross-cutting)⚠ not certain from listing

Not certain from the listing — no mention of authentication, authorization, or compliance controls. Threats include lack of access control, allowing any local process or subagent to modify critical system instructions without authorization.

L7 · Agent Ecosystem✓ mapped

Spawns 'iterative refinement subagents' to critique and draft prompts. Threats include multi-agent trust abuse, where a compromised subagent feeds malicious instructions back to the parent agent, leading to cascading compromises of the developer's workspace.

MAESTRO — the 7-layer agentic threat-modeling framework (Cloud Security Alliance / Ken Huang).