🛡️ CVE-2026-33678
🟠 CVSS 8.1 — High ✅ No Known Exploit CWE-639 NVD
8.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, `TaskAttachment.ReadOne()` queries attachments by ID only (`WHERE id = ?`), ignoring the task ID from the URL path. The permission check in `CanRead()` validates access to the task specified in the URL, but `ReadOne()` loads a different attachment that may belong to a task in another project. This allows any authenticated user to download or delete any attachment in the system by providing their own accessible task ID with a target attachment ID. Attachment IDs are sequential integers, making enumeration trivial. Version 2.2.1 patches the issue.

Details

Severity HIGH
CVSS Score 8.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE CWE-639
Public Exploit ✅ No
Source NVD
Published 2026-03-25
Updated 2026-06-15
Modified 2026-03-26
Fix URL N/A

Affected Packages

Software From version Fixed in
code.vikunja.io/api
vikunja 2.2.1

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