--- title: CBSE Security Breach: Could This Happen Again? | daily.dev description: A breakdown of the CBSE onscreen marking portal security breach that exposed records of nearly 2 million students. The system had four critical flaws:... canonical: https://daily.dev/posts/cbse-security-breach-could-this-happen-again--fbedd2kzo twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: CBSE Security Breach: Could This Happen Again? | daily.dev og:description: A breakdown of the CBSE onscreen marking portal security breach that exposed records of nearly 2 million students. The system had four critical flaws:... og:url: https://daily.dev/posts/cbse-security-breach-could-this-happen-again--fbedd2kzo og:image: https://api.daily.dev/og/posts/FbEDd2KZo.png og:image:alt: CBSE Security Breach: Could This Happen Again? 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. # CBSE Security Breach: Could This Happen Again? **[ByteMonk](https://daily.dev/sources/bytemonk)** · 13 min read · 4 upvotes · 0 comments ## Summary A breakdown of the CBSE onscreen marking portal security breach that exposed records of nearly 2 million students. The system had four critical flaws: client-side authentication enforcement (trust boundary violation), a hardcoded master password in frontend JavaScript, missing object-level authorization (IDOR/BOLA — OWASP API #1), and a publicly listable misconfigured S3 bucket. Each flaw is explained with its root cause and the correct server-side fix. The post also covers the difference between vulnerabilities, exploitation, and DDoS attacks, and closes with a defense-in-depth mental model: the server is the sole trust boundary, owning all auth, secrets, and file access brokering. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Vulnerabilities Expose Private Data in Indian Government Systems](https://daily.dev/posts/vulnerabilities-expose-private-data-in-indian-government-systems-4e1trriep) · Dark Reading · 1 upvotes · 0 comments - [How I Hacked My College’s Website and Found a CVE Affecting 100\+ Institutions across India](https://daily.dev/posts/how-i-hacked-my-college-s-website-and-found-a-cve-affecting-100-institutions-across-india-kigpolq97) · InfoSec Write-ups · 0 upvotes · 0 comments - [Student Data at Risk: What the Victoria Education Breach Exposes About Public Sector Security](https://daily.dev/posts/student-data-at-risk-what-the-victoria-education-breach-exposes-about-public-sector-security-gw9wkbjsv) · Security Boulevard · 0 upvotes · 0 comments --- Tags: [#authentication](https://daily.dev/tags/authentication), [#aws-s3](https://daily.dev/tags/aws-s3), [#authorization](https://daily.dev/tags/authorization), [#web-security](https://daily.dev/tags/web-security) [View this post on daily.dev](https://daily.dev/posts/cbse-security-breach-could-this-happen-again--fbedd2kzo) ```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":"CBSE Security Breach: Could This Happen Again?","url":"https://daily.dev/posts/cbse-security-breach-could-this-happen-again--fbedd2kzo","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/cbse-security-breach-could-this-happen-again--fbedd2kzo"},"datePublished":"2026-06-07T04:00:30.197Z","dateModified":"2026-06-07T04:00:49.289Z","description":"A breakdown of the CBSE onscreen marking portal security breach that exposed records of nearly 2 million students. 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