{"id":48159,"date":"2026-06-02T14:54:25","date_gmt":"2026-06-02T11:54:25","guid":{"rendered":"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/"},"modified":"2026-06-02T14:54:25","modified_gmt":"2026-06-02T11:54:25","slug":"crashexploitfixer","status":"publish","type":"mod","link":"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/","title":{"rendered":"CrashExploitFixer"},"content":{"rendered":"

CrashExploitFixer<\/h1>\n

This mod fixes a server crash exploit that has been bandaid-fixed by Mojang in Minecraft 1.21.1, which allows malicious players to crash a server immediately after joining it.
\nIt is currently estimated that this exploit is available on all versions back to 1.14.4!<\/p>\n

If you are interested in the technical details of this exploit I recommend reading haykam’s blogpost on the topic.<\/p>\n

## What Minecraft versions are affected?<\/p>\n

All versions between 1.14.4 and 1.21 (inclusive) are confirmed to be affected. The issue was likely introduced in 17w45b, a 1.13 snapshot.<\/p>\n

## How hard is it to perform the exploit?<\/p>\n

There has been some confusion on this. Mojang fixed two crash exploits in 1.21.1! One has been made very popular through a youtube video and has a lot of other cool exploits, but requires A LOT of complicated setup. The other exploit however allows anyone who has access to join a server (no permissions or anything required) to immediately crash it by sending one malicious packet!<\/p>\n

## I don’t know you or your mods, how do I trust you?<\/p>\n

I am trying to keep everything as transparent as possible.<\/p>\n

– The project is open source and can be inspected on github<\/p>\n

– The mod is very small, the entire patch logic lies within one small mixin and implements logic from paper that has already been tested on approximately 100.000 paper servers.<\/p>\n

– The mod has already been successfully included in many major modpacks!<\/p>\n","protected":false},"excerpt":{"rendered":"

A port of Papers Improve-tag-parser-handling patch, to fix a server crash exploit.<\/p>\n","protected":false},"featured_media":48160,"template":"","meta":{"_minecraft_slug":"crashexploitfixer","_minecraft_project_id":"Z5GdSH3X","_minecraft_author":"DrexHD","_minecraft_license":"GPL-3.0-only","_minecraft_downloads":1387476,"_minecraft_follows":61,"_minecraft_client_side":"unsupported","_minecraft_server_side":"required","_minecraft_storage_type":"zip","_minecraft_archive_name":"crashexploitfixer.zip","_minecraft_size_bytes":20522160,"_minecraft_version_count":26,"_minecraft_updated_at":"2026-05-16T12:13:00.623957Z","_minecraft_date_created":"2024-08-09T05:22:32.546804Z","_minecraft_date_modified":"2026-05-10T22:44:16.876657Z","_minecraft_project_url":"https:\/\/modrinth.com\/mod\/crashexploitfixer","_minecraft_icon_attachment_id":48160,"_minecraft_imported_at":"2026-06-02T11:54:26+00:00","_minecraft_import_hash":"7405f64ebe2e5b87e922d52d7527d87b","_minecraft_versions":"","_minecraft_links":"","_minecraft_gallery":"","_minecraft_api_metadata":""},"mod_category":[97,104,126,158,90,98,92],"mod_loader":[99,106,160,100],"minecraft_version":[114,115,116,117,118,119,120,46,47,48,49,50,51,52,53,54,55,56,57,58,59,36,60,93,94,101,102,62,37,40,41,814,73,74,38,78,79,784,80,81,82,83,832,167,163],"class_list":["post-48159","mod","type-mod","status-publish","has-post-thumbnail","hentry","mod_category-fabric","mod_category-forge","mod_category-management","mod_category-neoforge","mod_category-optimization","mod_category-quilt","mod_category-utility","mod_loader-fabric","mod_loader-forge","mod_loader-neoforge","mod_loader-quilt","minecraft_version-1-14-4","minecraft_version-1-15","minecraft_version-1-15-1","minecraft_version-1-15-2","minecraft_version-1-16","minecraft_version-1-16-1","minecraft_version-1-16-2","minecraft_version-1-16-3","minecraft_version-1-16-4","minecraft_version-1-16-5","minecraft_version-1-17","minecraft_version-1-17-1","minecraft_version-1-18","minecraft_version-1-18-1","minecraft_version-1-18-2","minecraft_version-1-19","minecraft_version-1-19-1","minecraft_version-1-19-2","minecraft_version-1-19-3","minecraft_version-1-19-4","minecraft_version-1-20","minecraft_version-1-20-1","minecraft_version-1-20-2","minecraft_version-1-20-3","minecraft_version-1-20-4","minecraft_version-1-20-5","minecraft_version-1-20-6","minecraft_version-1-21","minecraft_version-1-21-1","minecraft_version-1-21-10","minecraft_version-1-21-11","minecraft_version-1-21-11-rc2","minecraft_version-1-21-2","minecraft_version-1-21-3","minecraft_version-1-21-4","minecraft_version-1-21-5","minecraft_version-1-21-6","minecraft_version-1-21-6-rc1","minecraft_version-1-21-7","minecraft_version-1-21-8","minecraft_version-1-21-9","minecraft_version-26-1","minecraft_version-26-1-rc-3","minecraft_version-26-1-1","minecraft_version-26-1-2"],"yoast_head":"\nCrashExploitFixer - Minecraft<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CrashExploitFixer - Minecraft\" \/>\n<meta property=\"og:description\" content=\"A port of Papers Improve-tag-parser-handling patch, to fix a server crash exploit.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/\" \/>\n<meta property=\"og:site_name\" content=\"Minecraft\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/mods\\\/crashexploitfixer\\\/\",\"url\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/mods\\\/crashexploitfixer\\\/\",\"name\":\"CrashExploitFixer - Minecraft\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/mods\\\/crashexploitfixer\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/mods\\\/crashexploitfixer\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/crashexploitfixer-icon-651cccc26df71e75bdf4ce4d43a0b1fba029e9fd_96.webp\",\"datePublished\":\"2026-06-02T11:54:25+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/mods\\\/crashexploitfixer\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/mods\\\/crashexploitfixer\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/mods\\\/crashexploitfixer\\\/#primaryimage\",\"url\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/crashexploitfixer-icon-651cccc26df71e75bdf4ce4d43a0b1fba029e9fd_96.webp\",\"contentUrl\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/crashexploitfixer-icon-651cccc26df71e75bdf4ce4d43a0b1fba029e9fd_96.webp\",\"width\":96,\"height\":96},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/mods\\\/crashexploitfixer\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Mods\",\"item\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/mods\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"CrashExploitFixer\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/#website\",\"url\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/\",\"name\":\"Minecraft\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/vpesports.com\\\/minecraft\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"CrashExploitFixer - Minecraft","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/","og_locale":"en_US","og_type":"article","og_title":"CrashExploitFixer - Minecraft","og_description":"A port of Papers Improve-tag-parser-handling patch, to fix a server crash exploit.","og_url":"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/","og_site_name":"Minecraft","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/","url":"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/","name":"CrashExploitFixer - Minecraft","isPartOf":{"@id":"https:\/\/vpesports.com\/minecraft\/#website"},"primaryImageOfPage":{"@id":"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/#primaryimage"},"image":{"@id":"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/#primaryimage"},"thumbnailUrl":"https:\/\/vpesports.com\/minecraft\/wp-content\/uploads\/2026\/06\/crashexploitfixer-icon-651cccc26df71e75bdf4ce4d43a0b1fba029e9fd_96.webp","datePublished":"2026-06-02T11:54:25+00:00","breadcrumb":{"@id":"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/#primaryimage","url":"https:\/\/vpesports.com\/minecraft\/wp-content\/uploads\/2026\/06\/crashexploitfixer-icon-651cccc26df71e75bdf4ce4d43a0b1fba029e9fd_96.webp","contentUrl":"https:\/\/vpesports.com\/minecraft\/wp-content\/uploads\/2026\/06\/crashexploitfixer-icon-651cccc26df71e75bdf4ce4d43a0b1fba029e9fd_96.webp","width":96,"height":96},{"@type":"BreadcrumbList","@id":"https:\/\/vpesports.com\/minecraft\/mods\/crashexploitfixer\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/vpesports.com\/minecraft\/"},{"@type":"ListItem","position":2,"name":"Mods","item":"https:\/\/vpesports.com\/minecraft\/mods\/"},{"@type":"ListItem","position":3,"name":"CrashExploitFixer"}]},{"@type":"WebSite","@id":"https:\/\/vpesports.com\/minecraft\/#website","url":"https:\/\/vpesports.com\/minecraft\/","name":"Minecraft","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/vpesports.com\/minecraft\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/vpesports.com\/minecraft\/wp-json\/wp\/v2\/mod\/48159","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vpesports.com\/minecraft\/wp-json\/wp\/v2\/mod"}],"about":[{"href":"https:\/\/vpesports.com\/minecraft\/wp-json\/wp\/v2\/types\/mod"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vpesports.com\/minecraft\/wp-json\/wp\/v2\/media\/48160"}],"wp:attachment":[{"href":"https:\/\/vpesports.com\/minecraft\/wp-json\/wp\/v2\/media?parent=48159"}],"wp:term":[{"taxonomy":"mod_category","embeddable":true,"href":"https:\/\/vpesports.com\/minecraft\/wp-json\/wp\/v2\/mod_category?post=48159"},{"taxonomy":"mod_loader","embeddable":true,"href":"https:\/\/vpesports.com\/minecraft\/wp-json\/wp\/v2\/mod_loader?post=48159"},{"taxonomy":"minecraft_version","embeddable":true,"href":"https:\/\/vpesports.com\/minecraft\/wp-json\/wp\/v2\/minecraft_version?post=48159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}