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Vulnerability record · CVE-2026-25561 · published 7 February 2026

CVE-2026-25561: Wekan project wekan incorrect authorization vulnerability

WWekan Project · Wekan

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.

7.1 CVSS 4.0 High EPSS 0.41% · top 67.5% CWE-863 · Incorrect authorization
7.1CVSS 4.0 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
14 Jul 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/wekan/wekan/commit/1d16955b6d4f0a0282e89c2c1b0415c7597019b8 Patch
https://wekan.fi/ Product
https://www.vulncheck.com/advisories/wekan-attachment-upload-object-relationship-validation-bypass Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2026-30844Wekan project wekan server-side request forgery (ssrf) vulnerabilityWekan is an open source kanban tool built with Meteor. Versions 8.32 and 8.33 are vulnerable to Server-Side Request Forgery (SSRF) via attachment URL…EPSS 0.42%9.3CVE-2026-30847Wekan project wekan information exposure vulnerabilityWekan is an open source kanban tool built with Meteor. In versions 8.31.0 through 8.33, the notificationUsers publication in Wekan publishes user doc…EPSS 0.41%9.3CVE-2026-30843Wekan project wekan insecure direct object reference vulnerabilityWekan is an open source kanban tool built with Meteor. Versions 8.32 and 8.33 have a critical Insecure Direct Object Reference (IDOR) issue which cou…EPSS 0.38%8.8CVE-2025-65780Wekan project wekan improper access control vulnerabilityAn issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16. Authenticated users can update their entire…EPSS 0.34%8.7CVE-2026-30846Wekan project wekan information exposure vulnerabilityWekan is an open source kanban tool built with Meteor. In versions 8.31.0 through 8.33, the globalwebhooks publication exposes all global webhook int…EPSS 0.60%8.7CVE-2026-25560Wekan project wekan ldap injection vulnerabilityWeKan versions prior to 8.19 contain an LDAP filter injection vulnerability in LDAP authentication. User-supplied username input is incorporated into…EPSS 0.89%8.2CVE-2025-65781Wekan project wekan improper authentication vulnerabilityAn 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 Authorizat…EPSS 0.34%8.1CVE-2025-65778Wekan project wekan cross-site scripting vulnerabilityAn issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16. Uploaded attachments can be served with att…EPSS 0.38%

Source: NIST National Vulnerability Database (record CVE-2026-25561), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.