{"id":2661,"date":"2025-12-11T09:55:55","date_gmt":"2025-12-11T09:55:55","guid":{"rendered":"https:\/\/www.ucartz.com\/updates\/nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity\/"},"modified":"2025-12-11T09:55:57","modified_gmt":"2025-12-11T09:55:57","slug":"nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/updates\/nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity\/","title":{"rendered":"Nextcloud Server Insufficient Logging Vulnerability (CVE-2025-66552) \u2014 Medium Severity"},"content":{"rendered":"<p>A recently discovered security flaw in Nextcloud Server and Nextcloud Enterprise Server could lead to gaps in your audit logs. This vulnerability, tracked as CVE-2025-66552, is important for administrators to understand as it impacts the ability to fully track file and folder actions within shared group folders.<\/p>\n<h2>CVE Details<\/h2>\n<p>This vulnerability affects:<\/p>\n<ul>\n<li><strong>Product:<\/strong> Nextcloud Server, Nextcloud Enterprise Server<\/li>\n<li><strong>Published:<\/strong> December 5, 2025<\/li>\n<li><strong>Severity:<\/strong> Medium<\/li>\n<li><strong>Status:<\/strong> Analyzed<\/li>\n<\/ul>\n<h2>Affected Products<\/h2>\n<p>The issue stems from incorrect path handling within the <code>admin_audit<\/code> application when dealing with group folders. This means that certain actions performed on files and folders inside these shared group folders might not have been recorded properly in the audit logs. The affected versions include:<\/p>\n<ul>\n<li>Nextcloud Server versions prior to 30.0.9<\/li>\n<li>Nextcloud Server versions prior to 31.0.1<\/li>\n<li>Nextcloud Enterprise Server versions prior to 30.0.9<\/li>\n<li>Nextcloud Enterprise Server versions prior to 31.0.1<\/li>\n<\/ul>\n<h2>Current Status<\/h2>\n<p>This vulnerability has been officially analyzed. Nextcloud has released updates to address the issue.<\/p>\n<h2>Severity Level<\/h2>\n<p>CVE-2025-66552 is rated as <b>Medium<\/b> severity with a CVSS score of 4.3. This rating indicates that while an attacker needs low privileges and network access, the direct impact on confidentiality and integrity is none, and the impact on availability is low. However, insufficient logging can still be problematic for compliance and incident response, as it means crucial activity might go undetected.<\/p>\n<h2>Possible Solutions<\/h2>\n<p>Nextcloud has released patches to fix this logging vulnerability. It is strongly recommended that all users and administrators update their installations as soon as possible.<\/p>\n<ul>\n<li>Upgrade Nextcloud Server to version <strong>30.0.9<\/strong> or later.<\/li>\n<li>Upgrade Nextcloud Server to version <strong>31.0.1<\/strong> or later.<\/li>\n<li>Upgrade Nextcloud Enterprise Server to version <strong>30.0.9<\/strong> or later.<\/li>\n<li>Upgrade Nextcloud Enterprise Server to version <strong>31.0.1<\/strong> or later.<\/li>\n<\/ul>\n<p>Currently, there are no known workarounds for this specific issue, emphasizing the importance of applying the official patches.<\/p>\n<h2>References<\/h2>\n<p>https:\/\/github.com\/nextcloud\/security-advisories\/security\/advisories\/GHSA-ww9m-f8j4-jj9x<br \/>\nhttps:\/\/github.com\/nextcloud\/server\/commit\/7cc005c43c72bc384848cf8cb851895827c412f6<br \/>\nhttps:\/\/github.com\/nextcloud\/server\/pull\/50992<br \/>\nhttps:\/\/hackerone.com\/reports\/2890071<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A recently discovered security flaw in Nextcloud Server and Nextcloud Enterprise Server could lead to gaps in your audit logs. This vulnerability, tracked as CVE-2025-66552, is important for administrators to understand as it impacts the ability to fully track file and folder actions within shared group folders. CVE Details This vulnerability affects: Product: Nextcloud Server, [&hellip;]<\/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":[780,724,781,770,779],"class_list":["post-2661","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","tag-audit-logs","tag-data-integrity","tag-logging","tag-nextcloud","tag-server-security"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nextcloud Server Insufficient Logging Vulnerability (CVE-2025-66552) \u2014 Medium Severity - Web Hosting and IT Consultancy Services<\/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\/nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nextcloud Server Insufficient Logging Vulnerability (CVE-2025-66552) \u2014 Medium Severity - Web Hosting and IT Consultancy Services\" \/>\n<meta property=\"og:description\" content=\"A recently discovered security flaw in Nextcloud Server and Nextcloud Enterprise Server could lead to gaps in your audit logs. This vulnerability, tracked as CVE-2025-66552, is important for administrators to understand as it impacts the ability to fully track file and folder actions within shared group folders. CVE Details This vulnerability affects: Product: Nextcloud Server, [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ucartz.com\/updates\/nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity\/\" \/>\n<meta property=\"og:site_name\" content=\"Web Hosting and IT Consultancy Services\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-11T09:55:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-11T09:55:57+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=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity\\\/\"},\"author\":{\"name\":\"Alex Joseph\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/#\\\/schema\\\/person\\\/1ba9bfab02a76dee216c9f55bb634e56\"},\"headline\":\"Nextcloud Server Insufficient Logging Vulnerability (CVE-2025-66552) \u2014 Medium Severity\",\"datePublished\":\"2025-12-11T09:55:55+00:00\",\"dateModified\":\"2025-12-11T09:55:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity\\\/\"},\"wordCount\":333,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/NextCloud-Banner-Ucartz.webp\",\"keywords\":[\"Audit Logs\",\"Data Integrity\",\"Logging\",\"Nextcloud\",\"Server Security\"],\"articleSection\":[\"Security\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity\\\/\",\"url\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/nextcloud-server-insufficient-logging-vulnerability-cve-2025-66552-medium-severity\\\/\",\"name\":\"Nextcloud Server Insufficient Logging Vulnerability (CVE-2025-66552) \u2014 Medium Severity - 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