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vikunja

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, an authenticated user can read any task comment by ID, regardless of whether they have access to the task the comment belongs to, by substituting the task ID in the API URL with a task they do have access to. Version 2.2.0 fixes the issue.

CVE-2026-33313 is an authorization bypass vulnerability identified in the go-vikunja Vikunja task management platform, specifically affecting versions prior to 2.2.0. Vikunja is an open-source, self-hosted platform used for managing tasks and associated comments. The vulnerability stems from improper authorization checks (classified under CWE-639: Authorization Bypass Through User-Controlled Key) in the API endpoint responsible for retrieving task comments. An authenticated user can exploit this flaw by substituting the task ID in the API URL with a task ID they have access to, thereby tricking the system into returning comments from any task, including those they should not access. This bypass allows unauthorized reading of task comments, compromising confidentiality. The vulnerability does not require elevated privileges beyond authentication, nor does it require user interaction, making it relatively straightforward to exploit for authenticated users. The CVSS 4.0 base score is 5.3, reflecting a medium severity level due to the limited scope (only comments exposure) and the requirement for authentication. The issue was publicly disclosed on March 24, 2026, and fixed in Vikunja version 2.2.0. No known exploits have been reported in the wild to date. This vulnerability highlights the importance of strict authorization checks on user-controlled parameters in API endpoints, especially in collaborative platforms where sensitive information may be stored in comments.

Detailed information about CVE-2026-33313: CWE-639: Authorization Bypass Through User-Controlled Key in go-vikunja vikunja affecting go-vikunja vikunja. Get rea

CVE-2026-33313: CWE-639: Authorization Bypass Through User-Controlled Key in go-vikunja vikunja - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-33313: CWE-639: Authorization Bypass Through User-Controlled Key in go-vikunja vikunja

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