WeKan up to 8.18 Attachment Upload API attachmentApi.js authorization

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in WeKan up to 8.18. The impacted element is an unknown function of the file server/routes/attachmentApi.js of the component Attachment Upload API. Such manipulation leads to authorization. This vulnerability is uniquely identified as CVE-2026-25561. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in WeKan up to 8.18 and classified as critical. Affected by this issue is an unknown functionality of the file server/routes/attachmentApi.js of the component Attachment Upload API. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to 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. This allows attackers to bypass intended access restrictions. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed by Joshua Rogers as 1d16955b6d4f0a0282e89c2c1b0415c7597019b8. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-25561 since 02/02/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available.

Upgrading to version 8.19 eliminates this vulnerability. Applying the patch 1d16955b6d4f0a0282e89c2c1b0415c7597019b8 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-5711). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.7

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: WeKan 8.19
Patch: 1d16955b6d4f0a0282e89c2c1b0415c7597019b8

Timelineinfo

02/02/2026 CVE reserved
02/08/2026 +6 days Advisory disclosed
02/08/2026 +0 days VulDB entry created
07/16/2026 +158 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 1d16955b6d4f0a0282e89c2c1b0415c7597019b8
Researcher: Joshua Rogers
Status: Confirmed

CVE: CVE-2026-25561 (🔒)
GCVE (CVE): GCVE-0-2026-25561
GCVE (VulDB): GCVE-100-344912
EUVD: 🔒

Entryinfo

Created: 02/08/2026 02:04
Updated: 07/16/2026 07:39
Changes: 02/08/2026 02:04 (70), 02/08/2026 07:54 (1), 02/11/2026 09:10 (11), 07/16/2026 07:39 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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