CVE-2026-27116CWE-79CWE-80

Vikunja has Reflected HTML Injection via filter Parameter in Projects Module

Medium · published February 25, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
20.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00288 · 20.3th percentile
Weaknesses
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'); CWE-80 · Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Published
2026-02-25T21:33Z
EPSS history
Timeline
  • 25 FEB 21:33Z
    Vikunja has Reflected HTML Injection via filter Parameter in Projects Module
    cvelistv5