{"id":4337,"date":"2026-10-24T04:32:59","date_gmt":"2026-10-24T04:32:59","guid":{"rendered":"https:\/\/www.ucartz.com\/updates\/joomla-gridbox-unauthenticated-recursive-directory-deletion-vulnerability-cve-2026-65889-critical-severity\/"},"modified":"2026-10-24T04:33:04","modified_gmt":"2026-10-24T04:33:04","slug":"joomla-gridbox-unauthenticated-recursive-directory-deletion-vulnerability-cve-2026-65889-critical-severity","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/updates\/joomla-gridbox-unauthenticated-recursive-directory-deletion-vulnerability-cve-2026-65889-critical-severity\/","title":{"rendered":"Joomla Gridbox Unauthenticated Recursive Directory Deletion Vulnerability (CVE-2026-65889) \u2014 Critical Severity"},"content":{"rendered":"<h2>Understanding the Threat: Joomla Gridbox Directory Deletion<\/h2>\n<p>A severe security flaw has been uncovered in Balbooa\u2019s Gridbox, a popular drag-and-drop page builder for Joomla. This vulnerability, identified as CVE-2026-65889, allows an attacker to recursively delete directories on your website without needing any form of authentication. This means unauthorized individuals could potentially wipe out significant parts of your site\u2019s content, leading to data loss and disruption.<\/p>\n<h2>CVE Details<\/h2>\n<p>This particular vulnerability affects the Joomla Extension known as Balbooa Gridbox. It specifically targets the <code>generateNewApp<\/code> method, which contains a flaw that permits unauthenticated users to perform recursive directory deletions. <\/p>\n<ul>\n<li><strong>Product Name:<\/strong> Joomla Extension &#8211; Balbooa Gridbox<\/li>\n<li><strong>Published:<\/strong> July 29, 2026<\/li>\n<li><strong>Severity:<\/strong> Critical<\/li>\n<li><strong>Status:<\/strong> Analyzed<\/li>\n<\/ul>\n<h2>Affected Products<\/h2>\n<p>The unauthenticated recursive directory deletion vulnerability impacts all versions of Balbooa Gridbox for Joomla prior to 2.20.2. It\u2019s crucial to understand that if you are running any version older than 2.20.2, your website is at significant risk. The developers have since released further updates, with Gridbox 2.20.4.0 being the most current recommended version for full security fixes.<\/p>\n<h2>Current Status<\/h2>\n<p>The vulnerability has been thoroughly analyzed, and Balbooa has released patches to address it. However, the situation is urgent because this flaw, alongside several other critical issues in Gridbox, is actively being exploited in the wild. Attackers are scanning for and targeting unpatched websites, making immediate action essential to protect your Joomla site from potential harm.<\/p>\n<h2>Severity Level<\/h2>\n<p>CVE-2026-65889 is rated with a CVSS 4.0 score of 9.2, classifying it as a Critical severity vulnerability. This high score reflects the ease with which it can be exploited (no authentication required) and the devastating impact it can have. An attacker can initiate recursive directory deletion, potentially leading to complete data loss or severe defacement of your website without needing a user account or any prior access. Such an attack could render your site inoperable and cause significant reputational and financial damage.<\/p>\n<h2>Possible Solutions<\/h2>\n<p>To secure your Joomla website against this critical vulnerability and many others identified in Gridbox, follow these urgent steps:<\/p>\n<ol>\n<li><strong>Update Immediately:<\/strong> The most crucial step is to update your Gridbox installation to version 2.20.4.0 or later without delay. You can do this through Joomla\u2019s Extensions updater or by downloading the latest version from your Balbooa account.<\/li>\n<li><strong>Perform Backups:<\/strong> Before any update, always create a full backup of your website. This ensures you have a clean restore point in case any issues arise during the update process or if your site has already been compromised.<\/li>\n<li><strong>Check for Compromise:<\/strong> Given that these vulnerabilities are actively exploited, assume your site might already be affected. Look for any unauthorized administrator accounts. Tools like our <a href=\"https:\/\/mysites.guru\/blog\/find-rogue-admin-accounts-joomla\/\">Rogue Admin check<\/a> can help you identify suspicious accounts across all your Joomla sites. Also, check for unexpected PHP files or modified content, which could indicate a successful attack. For more detailed guidance, refer to our guide on <a href=\"https:\/\/mysites.guru\/blog\/how-to-fix-a-hacked-joomla-or-wordpress-site-with-mysites-guru\/\">how to fix a hacked Joomla or WordPress site<\/a>.<\/li>\n<li><strong>Rotate Credentials:<\/strong> If your site was running a vulnerable version, it\u2019s wise to rotate all sensitive credentials, including database passwords and Joomla secret keys, as they might have been exposed.<\/li>\n<li><strong>Consider Temporary Disabling:<\/strong> For high-value sites that cannot be patched immediately, consider temporarily disabling the Gridbox extension if your site\u2019s functionality allows it, until the update can be safely applied.<\/li>\n<\/ol>\n<p>For a complete overview of vulnerabilities specific to Gridbox and their corresponding fixes, you can use a <a href=\"https:\/\/mysites.guru\/joomla-vulnerability-scanner\/\">Joomla vulnerability scanner<\/a> to keep track of your site\u2019s security posture.<\/p>\n<h2>References<\/h2>\n<p>https:\/\/mysites.guru\/blog\/gridbox-23-critical-vulnerabilities\/<\/p>\n<p>https:\/\/www.balbooa.com\/gridbox<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Understanding the Threat: Joomla Gridbox Directory Deletion A severe security flaw has been uncovered in Balbooa\u2019s Gridbox, a popular drag-and-drop page builder for Joomla. This vulnerability, identified as<\/p>\n","protected":false},"author":17,"featured_media":2649,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[874,1292,1323,980,695],"class_list":["post-4337","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","tag-data-loss","tag-directory-deletion","tag-gridbox","tag-joomla","tag-web-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Joomla Gridbox Unauthenticated Recursive Directory | Ucartz<\/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:\/\/www.ucartz.com\/updates\/joomla-gridbox-unauthenticated-recursive-directory-deletion-vulnerability-cve-2026-65889-critical-severity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Joomla Gridbox Unauthenticated Recursive Directory Deletion Vulnerability (CVE-2026-65889) \u2014 Critical Severity - Ucartz Updates\" \/>\n<meta property=\"og:description\" content=\"Understanding the Threat: Joomla Gridbox Directory Deletion A severe security flaw has been uncovered in Balbooa\u2019s Gridbox, a popular drag-and-drop page builder for Joomla. This vulnerability, identified as\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ucartz.com\/updates\/joomla-gridbox-unauthenticated-recursive-directory-deletion-vulnerability-cve-2026-65889-critical-severity\/\" \/>\n<meta property=\"og:site_name\" content=\"Ucartz Updates\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-24T04:32:59+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-24T04:33:04+00:00\" \/>\n<meta name=\"author\" content=\"Alex Joseph\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Alex Joseph\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" 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Along with his support role, he write about security best practices, hosting infrastructure, and software management.","url":"https:\/\/www.ucartz.com\/updates\/author\/alexjoseph\/"}]}},"_links":{"self":[{"href":"https:\/\/www.ucartz.com\/updates\/wp-json\/wp\/v2\/posts\/4337","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ucartz.com\/updates\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ucartz.com\/updates\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ucartz.com\/updates\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ucartz.com\/updates\/wp-json\/wp\/v2\/comments?post=4337"}],"version-history":[{"count":1,"href":"https:\/\/www.ucartz.com\/updates\/wp-json\/wp\/v2\/posts\/4337\/revisions"}],"predecessor-version":[{"id":4338,"href":"https:\/\/www.ucartz.com\/updates\/wp-json\/wp\/v2\/posts\/4337\/revisions\/4338"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ucartz.com\/updates\/wp-json\/wp\/v2\/media\/2649"}],"wp:attachment":[{"href":"https:\/\/www.ucartz.com\/updates\/wp-json\/wp\/v2\/media?parent=4337"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ucartz.com\/updates\/wp-json\/wp\/v2\/categories?post=4337"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ucartz.com\/updates\/wp-json\/wp\/v2\/tags?post=4337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}