CVE-2026-33335
Vikunja Desktop allows arbitrary local application invocation via unvalidated shell.openExternal
- State
- Published
- Severity
- 6.4 Medium
- Published
- Mar 24, 2026
- Updated
- Mar 25, 2026
- Reserved
- Mar 18, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.4 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H | GitHub_M |
Weaknesses
- CWE-939 Improper Authorization in Handler for Custom URL Scheme
Affected Products
| Product | Versions |
|---|---|
vikunjago-vikunja |
|
References
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