CVE-2026-25561

WeKan < 8.19 Attachment Upload Object Relationship Validation Bypass

CVSS 7.1 HIGHEPSS 0.3%CWE-863

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Affected products

WeKan · WeKan

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References

https://github.com/wekan/wekan/commit/1d16955b6d4f0a0282e89c2c1b0415c7597019b8 https://wekan.fi/https://www.vulncheck.com/advisories/wekan-attachment-upload-object-relationship-validation-bypass