An issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16.

published 2025-12-15 10 mo ago modified 2026-10-14 25 d ago also EUVD-2025-203374

cvss: 8.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits: 0; none known

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.

Patch / fix

fixed in 1 links 1

wekan_project wekan 8.16

github.com/wekan/wekan@e9a7273 commit

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 10 mo ago (2025-12-16)

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
NVD	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CNA	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /wekan/wekan/commit/e9a727301d7b4f1689a703503df668c0f4f4cab8
patch
wekan.fi /hall-of-fame/spacebleed/
vendor-advisory
github.com /wekan/wekan
product
github.com /wekan/wekan/blob/main/CHANGELOG.md#v816-2025-11-02-wekan--release
release-notes

Sources

CVE List CVE-2025-65778
NVD CVE-2025-65778

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary