Pretty Prompt — agentic threat model
Pretty Prompt is a low-autonomy Chrome extension designed for prompt refinement within ChatGPT. Its primary security risks stem from its deployment as a browser extension (potential DOM access and data exfiltration of sensitive prompts) rather than autonomous agentic behaviors.
OWASP AIVSS score rationale
| Autonomy of Action | 0.10 | |
| Goal-Driven Planning | 0.10 | |
| Self-Modification | 0.00 | |
| Dynamic Tool Use | 0.10 | |
| Persistent Memory | 0.10 | |
| Contextual Awareness | 0.20 | |
| Dynamic Identity | 0.00 | |
| Multi-Agent Interactions | 0.00 | |
| Non-Determinism | 0.40 | |
| Opacity & Reflexivity | 0.30 |
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.
Not certain from the listing — likely relies on external foundation models (or ChatGPT itself) to perform prompt optimization. Primary threats include adversarial prompt injection and misaligned outputs during the rewriting process.
Not certain from the listing — there is no mention of dedicated vector databases or RAG pipelines. The primary risk is the potential transit and logging of user-inputted text to external servers for prompt optimization.
Not certain from the listing — the tool appears to be a utility script rather than a complex agent framework. Risks are limited to DOM manipulation errors within the ChatGPT interface.
Not certain from the listing — deployed as a Chrome Extension. Key threats include extension supply chain compromise, unauthorized browser permissions, and insecure API communication with backend servers.
Not certain from the listing — no evaluation, guardrails, or observability features are mentioned. There is likely a blind spot regarding how user prompts are processed and whether malicious inputs are filtered.
Not certain from the listing — 'No login needed' indicates a lack of user authentication controls, and there are no cited compliance certifications (e.g., SOC2), which is typical for freemium browser extensions.
Not certain from the listing — does not participate in multi-agent orchestration or marketplaces, though it operates directly inside the ChatGPT ecosystem, creating a dependency on OpenAI's platform security.
MAESTRO — the 7-layer agentic threat-modeling framework (Cloud Security Alliance / Ken Huang).