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Lemon Agent — agentic threat model

7.5AIVSS 7.5 · High

Lemon Agent presents a high agentic risk profile due to its multi-agent architecture (Planner-Solver) and deep integration with sensitive business tools like GitHub and HubSpot. While its Plan-Validate-Solve structure and human-in-the-loop capabilities offer structural mitigations, unauthorized tool execution or prompt injection could lead to significant data exfiltration or code compromise.

OWASP AIVSS score rationale

AIVSS = (CVSS_Base + AARS) × Mitigation_Factor, where AARS = (10 − CVSS_Base) × (Factor_Sum / 10) × ThM
CVSS base 8.5AARS uplift 0.89Factor sum 5.9/10Threat ×1.0Mitigation ×0.8
Autonomy of Action
0.60
Goal-Driven Planning
0.80
Self-Modification
0.20
Dynamic Tool Use
0.80
Persistent Memory
0.40
Contextual Awareness
0.70
Dynamic Identity
0.50
Multi-Agent Interactions
0.80
Non-Determinism
0.60
Opacity & Reflexivity
0.50

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 — The specific foundation models used by Lemon Agent are not disclosed. Standard LLM risks such as prompt injection, adversarial manipulation, and misaligned outputs could directly compromise the Planner or Solver agents, leading to unintended workflow execution.

L2 · Data Operations⚠ not certain from listing

Not certain from the listing — While the agent interacts with data-rich platforms like Airtable, HubSpot, and Notion, the internal data operations, vector storage, and RAG pipelines are not detailed. The primary threat is data exfiltration or unauthorized modification of connected databases.

L3 · Agent Frameworks✓ mapped

Lemon Agent uses a Plan-Validate-Solve (PVS) architecture to orchestrate tasks. The primary threat at this layer is tool misuse or insecure tool integration, where an attacker could exploit the Planner/Solver logic to execute unauthorized actions on connected platforms like GitHub or Discord.

L4 · Deployment & Infrastructure⚠ not certain from listing

Not certain from the listing — As an open-source platform with custom UI and CLI options, deployment is highly dependent on the user's infrastructure. Threats include insecure storage of API keys/secrets for integrated services (HubSpot, GitHub) and lack of sandboxing for executed tasks.

L5 · Evaluation & Observability⚠ not certain from listing

Not certain from the listing — The PVS architecture includes a 'Validate' step, but the listing does not detail comprehensive evaluation, logging, or guardrail frameworks. Insufficient logging of agent decisions could create blind spots during security incidents.

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

Not certain from the listing — Beyond mentioning 'human-in-the-loop interactions for critical steps,' there is no mention of enterprise security controls, role-based access control (RBAC), or compliance certifications (e.g., SOC2).

L7 · Agent Ecosystem✓ mapped

Lemon Agent natively employs a multi-agent ecosystem consisting of a Planner Agent and a Solver Agent. Threats include trust abuse between these agents, where a compromised Solver could feed malicious validation data back to the Planner, causing cascading workflow failures.

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