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.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-02-07
Last Modified
2026-02-10
Generated
2026-06-16
AI Q&A
2026-02-08
EPSS Evaluated
2026-06-15
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
CWE Icon
KEV
KEV Icon
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
AI Quick Actions
Instant insights powered by AI
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

I don't know

Detection Guidance

I don't know

Mitigation Strategies

I don't know

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-25561. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart