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CVE-2026-84805— Kimai 2.61.0 before 2.63.0 Authentication Bypass via API

Quick assessment

Affected
kimai kimai
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kimai是Kimai团队开源的一款项目管理系统。 Kimai 2.61.0版本至2.63.0之前版本存在授权问题漏洞，该漏洞源于PATCH /api/users/{id}/preferences端点未对管理员专用工作合同偏好进行权限检查，可能导致经过身份验证的普通用户通过API修改自身的受管理员限制的工作合同数据。

CVSS 4.3 · Medium EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1578 · Modify Cloud Compute Infrastructure

Affected Version Matrix 2

VendorProduct Version RangeStatus
kimai kimai 2.61.0< 2.63.0 affected
2.63.0 unaffected
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I. Basic Information for CVE-2026-84805

Vulnerability Information
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Vulnerability Title
Kimai 2.61.0 before 2.63.0 Authentication Bypass via API
Source: CVE Program / CVE List V5
Vulnerability Description
Kimai versions from 2.61.0 before 2.63.0 fail to disable admin-only work-contract preferences for low-privilege users in the PATCH /api/users/{id}/preferences endpoint. Although the web interface gates these employment-contract fields behind the contract_other_profile admin permission, the WorkContractPreferenceSubscriber (introduced in 2.61.0) registers the preferences as enabled without a permission check, so an authenticated regular user can use the API to modify their own admin-only work-contract data. The issue is fixed in 2.63.0 by applying the same permission check to the API endpoint.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Kimai 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kimai是Kimai团队开源的一款项目管理系统。 Kimai 2.61.0版本至2.63.0之前版本存在授权问题漏洞，该漏洞源于PATCH /api/users/{id}/preferences端点未对管理员专用工作合同偏好进行权限检查，可能导致经过身份验证的普通用户通过API修改自身的受管理员限制的工作合同数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
kimai kimai 2.61.0 ~ 2.63.0 -

II. Public POCs for CVE-2026-84805

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III. Intelligence Information for CVE-2026-84805

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Vendor Advisories for CVE-2026-84805 (2)

Same Patch Batch · kimai · 2026-09-02 · 5 CVEs total

CVE-2026-84807 5.4 MEDIUM Kimai before 2.65.0 Authentication Bypass via Team Creation
CVE-2026-84806 5.4 MEDIUM Kimai before 2.63.0 Authorization Bypass via Team Access Endpoints
CVE-2026-84804 5.4 MEDIUM Kimai before 2.65.0 Authorization Bypass via Team Activity API
CVE-2026-84808 4.3 MEDIUM Kimai before 2.65.0 Authorization Bypass via API Timesheet

IV. Related Vulnerabilities

Same product: kimai
Same vendor: kimai
Same weakness: CWE-862

V. Comments for CVE-2026-84805

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