CVE-2026-25561
Unknown Unknown - Not Provided

Authorization Bypass in WeKan Attachment Upload API Allows Unauthorized Uploads

Publication date: 2026-02-07

Last updated on: 2026-02-10

Assigner: VulnCheck

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.

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Meta Information

Published
2026-02-07
Last Modified
2026-02-10
Generated
2026-07-06
AI Q&A
2026-02-08
EPSS Evaluated
2026-07-05
NVD
CVE-2026-25561
EUVD
EUVD-2026-5711

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wekan_project wekan to 8.19 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

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Executive Summary

This vulnerability exists in Wekan versions prior to 8.19 and involves an authorization weakness in the attachment upload API.

The API does not fully validate that the provided identifiers—such as boardId, cardId, swimlaneId, and listId—are consistent and correctly related to each other within the card and board structure.

This flaw enables attackers to attempt uploading attachments with mismatched or incorrect object relationships, potentially bypassing intended access controls.

Impact Analysis

The vulnerability can allow unauthorized users with some level of privileges to upload attachments to cards or boards they should not have access to.

This could lead to unauthorized data being introduced into the system, potential data integrity issues, and possible exposure or manipulation of information within the Wekan application.

Compliance Impact

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