Description
An issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16. Attachment upload API treats the Authorization bearer value as a userId and enters a non-terminating body-handling branch for any non-empty bearer token, enabling trivial application-layer DoS and latent identity-spoofing.
Affected products
wekan_project: wekan
References4
- wekan.fi/hall-of-fame/spacebleed/ Vendor Advisory
- github.com/wekan/wekan/commit/ccd90343394f433b287733ad0a33c08e0… 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
-
8.2
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - EPSS — exploit probability
- 0% percentile: 28 · as of 11 November 2026
- CWE
- CWE-287CWE-400
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.