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Building an Interactive Manhattan Guide with Chatbot Demo Builder
Originally from mongodb.com
September 3, 2025 ‱ Roasted by Marcus "Zero Trust" Williams Read Original Article

Alright, let's see what we have here. "Know any good spots?" answered by a chatbot you built in ten minutes. Impressive. That’s about the same amount of time it’ll take for the first data breach to exfiltrate every document ever uploaded to this... thing. You're celebrating a speedrun to a compliance nightmare.

You say there was "no coding, no database setup—just a PDF." You call that a feature; I call it a lovingly crafted, un-sandboxed, un-sanitized remote code execution vector. You didn't build a chatbot builder, you built a Malicious Document Funnel. I can't wait to see what happens when someone uploads a PDF loaded with a polyglot payload that targets whatever bargain-bin parsing library you're using. But hey, at least it'll find the best pizza place while it's stealing session cookies.

And the best part? It "runs entirely in your browser without requiring a MongoDB Atlas account." Oh, fantastic. So all that data processing, embedding generation, and chunking of potentially sensitive corporate documents is happening client-side? My god, the attack surface is beautiful. You’re inviting every script kiddie on the planet to write a simple Cross-Site Scripting payload to slurp up proprietary data right from the user's DOM. Why bother hacking a server when the user’s own browser is serving up the crown jewels on a silver platter?

You’re encouraging people to prototype with "their own uploads." Let’s be specific about what "their own uploads" means in the real world:

And you're telling them to just drag-and-drop this into a "Playground." The name is more accurate than you know, because you're treating enterprise data security like a child's recess.

You’re so proud of your data settings. "Recursive chunking with 500-token chunks." That's wonderful. You’re meticulously organizing the deck chairs while the Titanic takes on water. No one cares about your elegant chunking strategy when the foundational premise is "let's process untrusted data in an insecure environment." You've optimized the drapes in a house with no doors.

But this... this is my favorite part:

Each query highlighted the Builder's most powerful feature: complete transparency. When we asked about pizza, we could see the exact vector search query that ran, which chunks scored highest, and how the LLM prompt was constructed.

You cannot be serious. You're calling prompt visibility a feature? You're literally handing attackers a step-by-step guide on how to perform prompt injection attacks! You’ve put a big, beautiful window on the front of your black box so everyone can see exactly which wires to cut. This isn't transparency; it's a public exhibition of your internal logic, gift-wrapped for anyone who wants to make your bot say insane things, ignore its guardrails, or leak its entire system prompt. This isn't a feature; it's CVE-2024-Waiting-To-Happen.

And then you top it all off with a "snapshot link that let the entire team test the chatbot." A shareable, public-by-default URL to a session that was seeded with a private document. What could possibly go wrong? It’s not like those links ever get accidentally pasted into public Slack channels, committed to a GitHub repo, or forwarded to the wrong person. Security by obscurity—a classic choice for people who want to appear on the front page of Hacker News for the wrong reasons.

You're encouraging people to build customer support bots and internal knowledge assistants with this. You are actively, knowingly guiding your users toward a GDPR fine. This tool isn’t getting anyone SOC 2 certified; it's getting them certified as the defendant in a class-action lawsuit.

You haven't built a revolutionary RAG experimentation tool. You've built a liability-as-a-service platform with a chat interface. Go enjoy your $1 pizza slice; you’re going to need to save your money for the legal fees.