Flomo MCP Server — agentic threat model
The Flomo MCP Server presents a low-to-moderate risk profile, acting as a simple write-only bridge to Flomo. The primary security concerns are the protection of the webhook bearer token and the potential for prompt injection to write unauthorized or spam content to the user's notes.
OWASP AIVSS score rationale
| Autonomy of Action | 0.30 | |
| Goal-Driven Planning | 0.10 | |
| Self-Modification | 0.00 | |
| Dynamic Tool Use | 0.10 | |
| Persistent Memory | 0.00 | |
| Contextual Awareness | 0.10 | |
| Dynamic Identity | 0.20 | |
| Multi-Agent Interactions | 0.20 | |
| Non-Determinism | 0.10 | |
| Opacity & Reflexivity | 0.10 |
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 — The MCP server itself does not specify or bundle a foundation model. However, any LLM orchestrating this tool is susceptible to prompt injection, which could trigger unauthorized or malicious writes to the Flomo account.
Not certain from the listing — The server does not manage a local vector database or RAG pipeline. The primary data risk is the potential poisoning of the target Flomo account's personal knowledge base with spam or malicious links.
The server exposes a single tool (write_note) via the Model Context Protocol. The main framework-level threat is tool misuse, where an orchestrating agent is tricked into writing unintended content due to lack of input validation at the tool boundary.
The server holds a sensitive Flomo webhook URL, which acts as a bearer token. If the hosting environment or configuration files are compromised, this secret can be exfiltrated, granting attackers direct write access to the user's Flomo account.
Not certain from the listing — There is no mention of built-in logging, input sanitization, or guardrails to monitor or filter the payload content sent to the webhook.
The server relies entirely on a single static webhook URL for authorization, lacking granular access controls, user-specific authentication, or audit logging within the MCP layer itself.
Not certain from the listing — While designed to be used by other agents in an MCP ecosystem, there are no explicit multi-agent coordination or marketplace trust mechanisms described.
MAESTRO — the 7-layer agentic threat-modeling framework (Cloud Security Alliance / Ken Huang).