CVE-2026-25935
Summary
The task preview component creates a unparented div. The div's innerHtml is set to the unescaped description of the task
Details
In the TaskGlanceTooltip.vue it temporarily creates a div and sets the innerHtml to the description here. Since there is no escaping on either the server or client side, a malicious user can share a project, create a malicious task, and cause an XSS on hover.
PoC
- Create a project
- Create a task with any description
- Use the api to update the task with a description containing unescaped HTML (ex:
<img src=x onerror="alert(localStorage.getItem('token'))"> - Share the project with any permission level
- Send malicious project to user and ask them to view task
Impact
Any user on an instance can cause an XSS on another
Package Versions Affected
Automatically patch vulnerabilities without upgrading
CVSS Version



Related Resources
References
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-m4g2-2q66-vc9v, https://nvd.nist.gov/vuln/detail/CVE-2026-25935, https://github.com/go-vikunja/vikunja/commit/dd0b82f00a8c9ded1c19a1e643a197c514be6d37, https://github.com/go-vikunja/vikunja, https://github.com/go-vikunja/vikunja/releases/tag/v1.1.0, https://vikunja.io/changelog/vikunja-v1.1.0-was-released
