Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, the Caldav endpoint allows login using Basic Authentication, which in turn allows users to bypass the TOTP on 2FA-enabled accounts. The user can then access standard project information that would normally be protected behind 2FA (if enabled), such as project name, description, etc. Version 2.2.0 patches the issue.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-47cr-f226-r4pq Vikunja has a 2FA Bypass via Caldav Basic Auth
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 24 Mar 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Vikunja
Vikunja vikunja
CPEs cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*
Vendors & Products Vikunja
Vikunja vikunja
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}


Tue, 24 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 24 Mar 2026 15:45:00 +0000

Type Values Removed Values Added
References

Tue, 24 Mar 2026 15:15:00 +0000

Type Values Removed Values Added
Description Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, the Caldav endpoint allows login using Basic Authentication, which in turn allows users to bypass the TOTP on 2FA-enabled accounts. The user can then access standard project information that would normally be protected behind 2FA (if enabled), such as project name, description, etc. Version 2.2.0 patches the issue.
Title Vikunja has a 2FA Bypass via Caldav Basic Auth
Weaknesses CWE-288
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-24T15:33:55.744Z

Reserved: 2026-03-18T21:23:36.676Z

Link: CVE-2026-33315

cve-icon Vulnrichment

Updated: 2026-03-24T15:33:45.879Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-24T15:16:35.227

Modified: 2026-03-24T19:21:46.057

Link: CVE-2026-33315

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses