CVE-2026-33315CWE-288

Vikunja has a 2FA Bypass via Caldav Basic Auth

Medium · published March 24, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
38.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
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
EPSS
0.00457 · 38.6th percentile
Weakness
CWE-288 · Authentication Bypass Using an Alternate Path or Channel
Published
2026-03-24T14:53Z
EPSS history
Timeline
  • 24 MAR 14:53Z
    Vikunja has a 2FA Bypass via Caldav Basic Auth
    cvelistv5