--- title: Decoding Log4j : What You Need to Know | daily.dev description: Log4j has unwittingly opened the door for malicious hackers to infiltrate organizations worldwide. Its vulnerability, known as CVE-2021–44228 or Log4Shell, has... canonical: https://daily.dev/posts/decoding-log4j-what-you-need-to-know-ucltmlevl twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Decoding Log4j : What You Need to Know | daily.dev og:description: Log4j has unwittingly opened the door for malicious hackers to infiltrate organizations worldwide. Its vulnerability, known as CVE-2021–44228 or Log4Shell, has... og:url: https://daily.dev/posts/decoding-log4j-what-you-need-to-know-ucltmlevl og:image: https://api.daily.dev/og/posts/uclTmlEVl.png og:image:alt: Decoding Log4j : What You Need to Know 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. # Decoding Log4j : What You Need to Know **[InfoSec Write-ups](https://daily.dev/sources/infosecwriteups)** · 3 min read · 0 upvotes · 0 comments ## Summary Log4j has unwittingly opened the door for malicious hackers to infiltrate organizations worldwide. Its vulnerability, known as CVE-2021–44228 or Log4Shell, has sent shockwaves through the digital landscape. It stemmed from a flaw in the JNDI (Java Naming and Directory Interface) feature of Log4J. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#security](https://daily.dev/tags/security), [#cyber](https://daily.dev/tags/cyber), [#java](https://daily.dev/tags/java), [#logging](https://daily.dev/tags/logging), [#vulnerability](https://daily.dev/tags/vulnerability), [#chatgpt](https://daily.dev/tags/chatgpt), [#log4shell](https://daily.dev/tags/log4shell) [View this post on daily.dev](https://daily.dev/posts/decoding-log4j-what-you-need-to-know-ucltmlevl) ```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":"Decoding Log4j : What You Need to Know","url":"https://daily.dev/posts/decoding-log4j-what-you-need-to-know-ucltmlevl","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/decoding-log4j-what-you-need-to-know-ucltmlevl"},"datePublished":"2023-06-12T08:48:06.622Z","dateModified":"2023-06-12T08:41:31.287Z","description":"Log4j has unwittingly opened the door for malicious hackers to infiltrate organizations worldwide. Its vulnerability, known as CVE-2021–44228 or Log4Shell, has...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/c0e0759c9ed48555052e60e59bd775ba?_a=AQADKdt","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/c0e0759c9ed48555052e60e59bd775ba?_a=AQADKdt","isAccessibleForFree":true,"articleSection":"InfoSec Write-ups","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"InfoSec Write-ups","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/f0dc21b5bbfd46fda36f7b4b53dd1705","url":"https://daily.dev/sources/infosecwriteups"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/decoding-log4j-what-you-need-to-know-ucltmlevl","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,cyber,java,logging,vulnerability,chatgpt,log4shell","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"InfoSec Write-ups","item":"https://daily.dev/sources/infosecwriteups"},{"@type":"ListItem","position":3,"name":"Decoding Log4j : What You Need to Know"}]} ```