--- title: Making A SQLi Lab Is Not Difficult, Build One With Me. description: A hands-on guide to building a deliberately vulnerable SQL injection lab using Node.js, Express, and SQLite. Covers setting up the project structure, writing... canonical: https://daily.dev/posts/making-a-sqli-lab-is-not-difficult-build-one-with-me--zjnbh9hrp twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Making A SQLi Lab Is Not Difficult, Build One With Me. | daily.dev og:description: A hands-on guide to building a deliberately vulnerable SQL injection lab using Node.js, Express, and SQLite. Covers setting up the project structure, writing... og:url: https://daily.dev/posts/making-a-sqli-lab-is-not-difficult-build-one-with-me--zjnbh9hrp og:image: https://api.daily.dev/og/posts/ZjnbH9hrp.png og:image:alt: Making A SQLi Lab Is Not Difficult, Build One With Me. og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Making A SQLi Lab Is Not Difficult, Build One With Me. **[InfoSec Write-ups](https://daily.dev/sources/infosecwriteups)** · 10 min read · 0 upvotes · 0 comments ## Summary A hands-on guide to building a deliberately vulnerable SQL injection lab using Node.js, Express, and SQLite. Covers setting up the project structure, writing intentionally insecure login code with raw string interpolation, exploiting it via comment-based injection (admin' -- -), and a UNION-based injection challenge to extract a flag from a hidden table. Also explains how to fix the vulnerability using prepared statements. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Guide to manually hunt SQL injection in web apps](https://daily.dev/posts/guide-to-manually-hunt-sql-injection-in-web-apps-koft9agnh) · InfoSec Write-ups · 3 upvotes · 0 comments - [Light TryHackMe Walkthrough](https://daily.dev/posts/light-tryhackme-walkthrough-tucqi4p2o) · InfoSec Write-ups · 2 upvotes · 0 comments - [Build an IDOR Vulnerability Lab: Why WHERE Clauses Don’t Protect Your API.](https://daily.dev/posts/build-an-idor-vulnerability-lab-why-where-clauses-don-t-protect-your-api--wmreqolv5) · InfoSec Write-ups · 0 upvotes · 0 comments - [Introduction to SQL Injection](https://daily.dev/posts/introduction-to-sql-injection-hkpw0exhr) · InfoSec Write-ups · 12 upvotes · 2 comments --- Tags: [#security](https://daily.dev/tags/security), [#sql](https://daily.dev/tags/sql), [#express](https://daily.dev/tags/express), [#sqlite](https://daily.dev/tags/sqlite) [View this post on daily.dev](https://daily.dev/posts/making-a-sqli-lab-is-not-difficult-build-one-with-me--zjnbh9hrp) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Making A SQLi Lab Is Not Difficult, Build One With Me.","url":"https://daily.dev/posts/making-a-sqli-lab-is-not-difficult-build-one-with-me--zjnbh9hrp","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/making-a-sqli-lab-is-not-difficult-build-one-with-me--zjnbh9hrp"},"datePublished":"2026-06-11T19:48:02.327Z","dateModified":"2026-06-11T19:48:28.454Z","description":"A hands-on guide to building a deliberately vulnerable SQL injection lab using Node.js, Express, and SQLite. 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