{"id":2691,"date":"2025-12-11T16:30:55","date_gmt":"2025-12-11T16:30:55","guid":{"rendered":"https:\/\/www.ucartz.com\/updates\/nextcloud-deck-permission-logic-vulnerability-cve-2025-66557-medium-severity\/"},"modified":"2025-12-11T16:31:07","modified_gmt":"2025-12-11T16:31:07","slug":"nextcloud-deck-permission-logic-vulnerability-cve-2025-66557-medium-severity","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/updates\/nextcloud-deck-permission-logic-vulnerability-cve-2025-66557-medium-severity\/","title":{"rendered":"Nextcloud Deck Permission Logic Vulnerability (CVE-2025-66557): Medium Severity"},"content":{"rendered":"<h2>Understanding the Nextcloud Deck Permission Issue<\/h2>\n<p>Nextcloud Deck, a popular Kanban-style tool for personal and team project organization within Nextcloud, had a security flaw. This issue could allow certain users to change the access rights of others, even when they shouldn&#8217;t have that power. This is a significant concern for teams relying on strict access controls for their project boards.<\/p>\n<h2>CVE Details<\/h2>\n<ul>\n<li><strong>Product:<\/strong> Nextcloud Deck<\/li>\n<li><strong>Published Date:<\/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 vulnerability impacts Nextcloud Deck versions prior to <strong>1.14.6<\/strong> and <strong>1.15.2<\/strong>.<\/p>\n<h2>Current Status<\/h2>\n<p>This vulnerability has been analyzed and confirmed.<\/p>\n<h2>Severity Level<\/h2>\n<p>The vulnerability has been rated with a <strong>Medium<\/strong> severity level. While not the most critical, it&#8217;s important to address promptly as it could lead to unauthorized changes in project permissions, potentially disrupting team workflows and data integrity.<\/p>\n<h2>Possible Solutions<\/h2>\n<p>Nextcloud has released updates that fix this permission logic issue. Users should update their Nextcloud Deck installations to the following versions or later:<\/p>\n<ul>\n<li><strong>Nextcloud Deck 1.14.6<\/strong><\/li>\n<li><strong>Nextcloud Deck 1.15.2<\/strong><\/li>\n<\/ul>\n<p>Applying these patches is crucial to ensure that user permissions are enforced correctly and to prevent unauthorized modifications by users with &#8220;Can share&#8221; privileges.<\/p>\n<h2>References<\/h2>\n<p>https:\/\/github.com\/nextcloud\/deck\/commit\/f1da8b30a455f02373d44154da04494c949a95ae<\/p>\n<p>https:\/\/github.com\/nextcloud\/deck\/pull\/7131<\/p>\n<p>https:\/\/github.com\/nextcloud\/security-advisories\/security\/advisories\/GHSA-wwr8-hx9g-rjvv<\/p>\n<p>https:\/\/hackerone.com\/reports\/3247499<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Understanding the Nextcloud Deck Permission Issue Nextcloud Deck, a popular Kanban-style tool for personal and team project organization within Nextcloud, had a security flaw. This issue could allow<\/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":[810,770,799,809,765],"class_list":["post-2691","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","tag-kanban","tag-nextcloud","tag-nextcloud-deck","tag-permission-bypass","tag-security-update"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nextcloud Deck Permission Logic - Ucartz Updates | Ucartz<\/title>\n<meta name=\"description\" content=\"Understanding the Nextcloud Deck Permission Issue Nextcloud Deck, a popular Kanban-style tool for personal and team project organization within Nextcloud,\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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