{"id":2683,"date":"2025-12-11T14:01:21","date_gmt":"2025-12-11T14:01:21","guid":{"rendered":"https:\/\/www.ucartz.com\/updates\/nextcloud-tables-missing-ownership-check-vulnerability-cve-2025-66551-medium-severity\/"},"modified":"2025-12-11T14:01:32","modified_gmt":"2025-12-11T14:01:32","slug":"nextcloud-tables-missing-ownership-check-vulnerability-cve-2025-66551-medium-severity","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/updates\/nextcloud-tables-missing-ownership-check-vulnerability-cve-2025-66551-medium-severity\/","title":{"rendered":"Nextcloud Tables Missing Ownership Check Vulnerability (CVE-2025-66551): Medium Severity"},"content":{"rendered":"<h2>Understanding the Nextcloud Tables Vulnerability<\/h2>\n<p>A security flaw has been found in the Nextcloud Tables application. This issue could allow a malicious user to move a column from their own created table into another user&#8217;s table. This unauthorized action could lead to data integrity issues or unauthorized access to sensitive information within the Nextcloud environment.<\/p>\n<h2>CVE Details<\/h2>\n<p><strong>Product Name:<\/strong> Nextcloud Tables<\/p>\n<p><strong>Published Date:<\/strong> December 5, 2025<\/p>\n<p><strong>Severity:<\/strong> Medium<\/p>\n<p><strong>Status:<\/strong> Analyzed<\/p>\n<h2>Affected Products<\/h2>\n<p>The Nextcloud Tables application is affected by this vulnerability. Specifically, all versions of Nextcloud Tables from 0.4.0 up to, but not including, 0.8.6, and versions from 0.9.0 up to, but not including, 0.9.3 are vulnerable.<\/p>\n<h2>Current Status<\/h2>\n<p>This vulnerability has been analyzed and confirmed by the Nextcloud security team. Fixes are available, and users are strongly advised to update their installations.<\/p>\n<h2>Severity Level<\/h2>\n<p>The vulnerability is rated as <strong>Medium<\/strong> severity with a CVSS score of 6.3 out of 10. While a malicious user needs some level of privilege and user interaction is required, the impact on data integrity can be high.<\/p>\n<h2>Possible Solutions<\/h2>\n<p>To protect your Nextcloud instance from this vulnerability, it is crucial to update your Nextcloud Tables application to a secure version. The recommended patched versions are:<\/p>\n<ul>\n<li><strong>Nextcloud Tables 0.8.6<\/strong><\/li>\n<li><strong>Nextcloud Tables 0.9.3<\/strong><\/li>\n<\/ul>\n<p>If an immediate update is not possible, a temporary workaround is to disable the Nextcloud Tables application until you can apply the patch. It is important to plan for and apply these updates as soon as possible to maintain the security of your Nextcloud environment.<\/p>\n<h2>References<\/h2>\n<p>https:\/\/github.com\/nextcloud\/security-advisories\/security\/advisories\/GHSA-w787-vwqp-8wr7<\/p>\n<p>https:\/\/github.com\/nextcloud\/tables\/commit\/39f24a62fb41fd7a8bda65325f8bbafdc91c731c<\/p>\n<p>https:\/\/github.com\/nextcloud\/tables\/pull\/1810<\/p>\n<p>https:\/\/hackerone.com\/reports\/3137895<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Understanding the Nextcloud Tables Vulnerability A security flaw has been found in the Nextcloud Tables application. This issue could allow a malicious user to move a column from<\/p>\n","protected":false},"author":17,"featured_media":2652,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[698,804,770,803,709],"class_list":["post-2683","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","tag-authorization-bypass","tag-data-security","tag-nextcloud","tag-nextcloud-tables","tag-web-application-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nextcloud Tables Missing Ownership Check - Ucartz | Ucartz<\/title>\n<meta name=\"description\" content=\"Understanding the Nextcloud Tables Vulnerability A security flaw has been found in the Nextcloud Tables application. 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