--- title: An easy way to find bugs: Enter wrong data | daily.dev description: Learn how to find bugs by entering incorrect data in online selling systems, particularly in discount code validation. This method can be useful for security... canonical: https://daily.dev/posts/an-easy-way-to-find-bugs-enter-wrong-data-opnuvzlav twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: An easy way to find bugs: Enter wrong data | daily.dev og:description: Learn how to find bugs by entering incorrect data in online selling systems, particularly in discount code validation. This method can be useful for security... og:url: https://daily.dev/posts/an-easy-way-to-find-bugs-enter-wrong-data-opnuvzlav og:image: https://api.daily.dev/og/posts/OpnuVzlaV.png og:image:alt: An easy way to find bugs: Enter wrong data 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. # An easy way to find bugs: Enter wrong data **[System Weakness](https://daily.dev/sources/systemweakness)** · 2 min read · 5 upvotes · 0 comments ## Summary Learn how to find bugs by entering incorrect data in online selling systems, particularly in discount code validation. This method can be useful for security testing and identifying system weaknesses. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#webdev](https://daily.dev/tags/webdev), [#testing](https://daily.dev/tags/testing), [#career](https://daily.dev/tags/career) [View this post on daily.dev](https://daily.dev/posts/an-easy-way-to-find-bugs-enter-wrong-data-opnuvzlav) ```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":"An easy way to find bugs: Enter wrong data","url":"https://daily.dev/posts/an-easy-way-to-find-bugs-enter-wrong-data-opnuvzlav","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/an-easy-way-to-find-bugs-enter-wrong-data-opnuvzlav"},"datePublished":"2024-05-15T16:55:27.202Z","dateModified":"2024-05-15T16:55:26.631Z","description":"Learn how to find bugs by entering incorrect data in online selling systems, particularly in discount code validation. 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