Description
An issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16. Authorization flaw in card update handling allows board members (and potentially other authenticated users) to add/remove arbitrary user IDs in vote.positive / vote.negative arrays, enabling vote forgery and unauthorized voting.
Affected products
wekan_project: wekan
References4
- wekan.fi/hall-of-fame/spacebleed/ Vendor Advisory
- github.com/wekan/wekan/commit/0a1a075f3153e71d9a858576f1c68d292… Patch
- github.com/wekan/wekan Product
- github.com/wekan/wekan/blob/main/CHANGELOG.md#v816-2025-11-02-w… Release Notes
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - EPSS — exploit probability
- 0% percentile: 18 · as of 11 November 2026
- CWE
- CWE-285
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.