5.7

CVE-2026-33473: Vikunja has TOTP Reuse During Validity Window

Analyzed
AliasesGHSA-p747-qc5p-773rGO-2026-4805
Published 24-03-2026Last modified 24-03-2026

Vulnerability summary

CVE-2026-33473 is a medium (CVSS 5.7) Improper Authentication vulnerability in go-vikunja vikunja. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.39%
0%100%
Low · +0.13 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:1135-1

Timeline

  1. 24-03-2026
    PublishedVulnerability first disclosed.
  2. 24-03-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

32%

Versus all other CVEs

30-day change

Increase +0.13 pp

From 0.26% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Vikunja

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Code.vikunja.io1 product
  • api≥ 0.13 (No fix recorded) | All versions (No fix recorded)
Go-vikunja1 product
Vikunja1 product

3 vendors · 3 products

References

5 links