CVE-2026-27116

Vikunja has Reflected HTML Injection via filter Parameter in Projects Module

Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, a reflected HTML injection vulnerability exists in the Projects module where the `filter` URL parameter is rendered into the DOM without output encoding when the user clicks "Filter." While `<script>` and `<iframe>` are blocked, `<svg>`, `<a>`, and formatting tags (`<h1>`, `<b>`, `<u>`) render without restriction — enabling SVG-based phishing buttons, external redirect links, and content spoofing within the trusted application origin. Version 2.0.0 fixes this issue.

Affected

go-vikunja · vikunja

CVSS v3.1 GITHUB

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.29% chance of exploitation in the next 30 days, 20th percentile

Published

2026-02-25

Proof-of-concept exploits (1)

• advisories/GHSA-4qgr-4h56-8895

Security advisories

• go-vikunja/vikunja/security/advisories/GHSA-4qgr-4h56-8895
• https://vikunja.io/changelog/vikunja-v2.0.0-was-released

References

• CVE Record
• NVD entry