CVE-2026-33473

Vikunja is an open-source self-hosted task management platform. Starting in version 0.13 and prior to version 2.2.1, any user that has enabled 2FA can have their TOTP reused during the standard 30 second validity window. Version 2.2.1 patches the issue...

CVE-2026-33473

CVE-2026-33473 describes a TOTP reuse vulnerability in Vikunja: any user with 2FA enabled can reuse their TOTP within the standard 30-second window in versions prior to 2.2.1. The issue affects Vikunja 0.13 up to before 2.2.1 and is fixed in 2.2.1. The CVSS 3.1 base score is 5.7 (Medium). Actiona...

GHSA-P747-QC5P-773R Vikunja has TOTP Reuse During Validity Window

Summary Any user that has enabled 2FA can have their TOTP reused during the standard 30 second validity window. Details The below code is called when a user that has 2FA is authenticating to the application. Once they submit a valid username-password-totp combination, the user gets authenticated...