XSS in Wekan Project
CVE-2025-65778
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
Weakness classification (CWE)
References
- github.com/wekan/wekan (Product)
- wekan.fi/hall-of-fame/spacebleed/ (Vendor Advisory)
- github.com/wekan/wekan/commit/e9a727301d7b4f1689a703503df668c0f4f4cab8 (Patch)
- github.com/wekan/wekan/blob/main/CHANGELOG.md (Release Notes)
Frequently asked questions
- What is CVE-2025-65778?
- CVE-2025-65778 is a high-severity vulnerability in Wekan Project, classified under Cross-site Scripting. CVSS score: 8.1/10. Published 2025-12-15.
- How severe is CVE-2025-65778?
- High severity. CVSS v3 base score is 8.1 out of 10.