Wekan up to 9.88 Permission Check boards.js canUpdateBoardSort privileges management

Summaryinfo

A vulnerability, which was classified as critical, was found in Wekan up to 9.88. Impacted is the function canUpdateBoardSort of the file server/permissions/boards.js of the component Permission Check. Such manipulation leads to privileges management. This vulnerability is uniquely identified as CVE-2026-68561. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Wekan up to 9.88 and classified as critical. Affected by this issue is the function canUpdateBoardSort of the file server/permissions/boards.js of the component Permission Check. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Wekan is open source kanban built with Meteor. Prior to 9.89, the second Boards.allow({ update }) rule in server/permissions/boards.js called canUpdateBoardSort in server/lib/utils.js, which authorized any board member whenever fieldNames included sort. Because Meteor combines allow rules with OR semantics and applies the complete modifier, a comment-only or read-only member could send one Boards.update with $set values for sort, members, permission, and title, make themselves the sole board administrator, expose a private board, and evict the legitimate owner; the last-admin deny rule inspected only $pull and did not block a wholesale $set of members. Version 9.89 requires sort to be the only modified field and rejects $set member arrays that remove the last active administrator. This issue is fixed in version 9.89.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-68561 since 07/30/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 9.89 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• Wekan

Version

• 9.0
• 9.1
• 9.2
• 9.3
• 9.4
• 9.5
• 9.6
• 9.7
• 9.8
• 9.9
• 9.10
• 9.11
• 9.12
• 9.13
• 9.14
• 9.15
• 9.16
• 9.17
• 9.18
• 9.19
• 9.20
• 9.21
• 9.22
• 9.23
• 9.24
• 9.25
• 9.26
• 9.27
• 9.28
• 9.29
• 9.30
• 9.31
• 9.32
• 9.33
• 9.34
• 9.35
• 9.36
• 9.37
• 9.38
• 9.39
• 9.40
• 9.41
• 9.42
• 9.43
• 9.44
• 9.45
• 9.46
• 9.47
• 9.48
• 9.49
• 9.50
• 9.51
• 9.52
• 9.53
• 9.54
• 9.55
• 9.56
• 9.57
• 9.58
• 9.59
• 9.60
• 9.61
• 9.62
• 9.63
• 9.64
• 9.65
• 9.66
• 9.67
• 9.68
• 9.69
• 9.70
• 9.71
• 9.72
• 9.73
• 9.74
• 9.75
• 9.76
• 9.77
• 9.78
• 9.79
• 9.80
• 9.81
• 9.82
• 9.83
• 9.84
• 9.85
• 9.86
• 9.87
• 9.88

Website

• Product: https://github.com/wekan/wekan/

CPE 2.3info

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