EUVD-2026-13708
GHSA-564f-wx8x-878h
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Lifecycle Timeline
4Description
Vikunja is an open-source self-hosted task management platform. Starting in version 0.20.2 and prior to version 2.2.0, the `DELETE /api/v1/projects/:project/background` endpoint checks `CanRead` permission instead of `CanUpdate`, allowing any user with read-only access to a project to permanently delete its background image. Version 2.2.0 fixes the issue.
Analysis
A permission-check bypass vulnerability exists in Vikunja versions 0.20.2 through 2.1.x where the DELETE /api/v1/projects/:project/background endpoint incorrectly validates CanRead permissions instead of CanUpdate permissions, allowing read-only project members to permanently delete a project's background image. This affects the go-vikunja:vikunja product family, and the vulnerability has been patched in version 2.2.0 as documented in the GitHub security advisory GHSA-564f-wx8x-878h.
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Remediation
Within 30 days: Identify affected systems running version 0.20.2 and and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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External POC / Exploit Code
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