---
id: CVE-2025-65778
title: >-
  An issue was discovered in Wekan The Open Source kanban board system up to
  version 18.15, fixed in 18.16
summary: >-
  An issue was discovered in Wekan The Open Source kanban board system up to
  version 18.15, fixed in 18.16. Uploaded attachments can be served with
  attacker-controlled Content-Type (text/html), allowing execution of
  attacker-supplied HTML/…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-79
vendor: wekan_project
product: wekan
affected:
  - wekan < 8.16
patched:
  - wekan 8.16
published: '2025-12-15'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-65778'
references:
  - url: 'https://github.com/wekan/wekan'
    label: cve@mitre.org
  - url: >-
      https://github.com/wekan/wekan/blob/main/CHANGELOG.md#v816-2025-11-02-wekan--release
    label: cve@mitre.org
  - url: >-
      https://github.com/wekan/wekan/commit/e9a727301d7b4f1689a703503df668c0f4f4cab8
    label: cve@mitre.org
  - url: 'https://wekan.fi/hall-of-fame/spacebleed/'
    label: cve@mitre.org
tags:
  - nvd
epss: 0.00379
epssPercentile: 0.30003
ingestedAt: '2026-10-14T13:30:58.426Z'
---

## Overview

An issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16. Uploaded attachments can be served with attacker-controlled Content-Type (text/html), allowing execution of attacker-supplied HTML/JS in the application's origin and enabling session/token theft and CSRF actions.

## Affected

- `wekan < 8.16`

## Remediation

Upgrade past the affected range:

- `wekan 8.16`