Home/CVE/Vikunja is an open-source self-hosted task management platform. Starting in version 0.21.0 and prior to version 2.2.0, t
CVE

CVE-2026-33335

Vikunja is an open-source self-hosted task management platform. Starting in version 0.21.0 and prior to version 2.2.0, t

Vikunja is an open-source self-hosted task management platform. Starting in version 0.21.0 and prior to version 2.2.0, the Vikunja Desktop Electron wrapper passes URLs from window.open() calls directly to shell.openExternal() without any validation or protocol allowlisting. An attacker who can place a link with target="_blank" (or that otherwise triggers window.open) in user-generated content can cause the victim's operating system to open arbitrary URI schemes, invoking local applications, opening local files, or triggering custom protocol handlers.

Version 2.2.0 patches the issue.

HIGH · CVSS 8 EPSS 0.00051
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-939Improper Authorization in Handler for Custom URL Scheme
▤

Affected Products & Versions

1
vikunja>= 0.21.0 and < 2.2.2
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-6q44-85gc-cjvfgithub.com
▣

Scoring & Timeline

8
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD24 Mar 2026 · 04:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://vikunja.io/changelog/vikunja-v2.2.0-was-releasedRelease Notes
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