CVE-2026-33335

Published: Mar 24, 2026 Last Modified: Mar 24, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,4
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: passive
Confidentiality: N/A
Integrity: N/A
Availability: N/A

Description

AI Translation Available

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.

939

Improper Authorization in Handler for Custom URL Scheme

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Other
Potential Impacts:
Gain Privileges Or Assume Identity Varies By Context Bypass Protection Mechanism
Applicable Platforms
Technologies: Mobile
View CWE Details
https://github.com/go-vikunja/vikunja/security/advisories/G…
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6q44-85gc-cjvf
https://vikunja.io/changelog/vikunja-v2.2.0-was-released
https://vikunja.io/changelog/vikunja-v2.2.0-was-released