CVE-2026-25935: Vikunja Affected by XSS Via Task Preview

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-11 · updated 2026-06-17
Weakness: CWE-80

Description

Vikunja is a todo-app to organize your life. Prior to 1.1.0, TaskGlanceTooltip.vue temporarily creates a div and sets the innerHtml to the description. 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. This vulnerability is fixed in 1.1.0.

Affected products

go-vikunja vikunja: before 1.1.0 — fixed in 1.1.0

How to fix

Upgrade to a fixed version: go-vikunja vikunja 1.1.0. Check the vendor advisory for mitigations.

References

https://github.com/go-vikunja/vikunja/commit/dd0b82f00a8c9ded1c19a1e643a197c514be6d37
https://github.com/go-vikunja/vikunja/releases/tag/v1.1.0
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-m4g2-2q66-vc9v
https://vikunja.io/changelog/vikunja-v1.1.0-was-released

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