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Vibe codingMediumvc-g493
Subject Ai code reviewLevel Mid–Senior~15 minCommon in Security interviewsIndustries Software development

Question

An AI added this Flask endpoint to let users change their account email. It passed the happy-path test. A security reviewer flags it. What's wrong, and what's the attack?

python
@app.route("/account/email", methods=["POST"])def change_email():    new_email = request.form["email"]    user_id = session["user_id"]    db.execute(        "UPDATE users SET email = %s WHERE id = %s",        (new_email, user_id),    )    db.commit()    return redirect("/account")
What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it — tests, edge cases, reading critically — and how you’d re-prompt or decompose to get it right.

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Describe your solution

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.