Description
WeKan versions prior to 8.19 contain an authorization weakness in the attachment upload API. The API does not fully validate that provided identifiers (such as boardId, cardId, swimlaneId, and listId) are consistent and refer to a coherent card/board relationship, enabling attempts to upload attachments with mismatched object relationships.
References (3)
Core 3
Core References
Product product
https://wekan.fi/
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/wekan-attachment-upload-object-relationship-validation-bypass
Scores
CVSS v3
7.5
EPSS
0.0001
EPSS Percentile
2.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-863
Status
published
Products (1)
wekan_project/wekan
< 8.19
Published
Feb 07, 2026
Tracked Since
Feb 18, 2026