CVE-2026-42051— Kirby: System API endpoint leaks license data and installed version to authenticated users
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-42051
Vulnerability Information
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Vulnerability Title
Kirby: System API endpoint leaks license data and installed version to authenticated users
Source: CVE Program / CVE List V5
Vulnerability Description
Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, the system API endpoint leaks license data and installed version to authenticated users. This issue has been patched in versions 4.9.0 and 5.4.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Kirby 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kirby是Kirby开源的一套基于文件的内容管理系统（CMS）。 Kirby 4.9.0之前版本和5.4.0之前版本存在安全漏洞，该漏洞源于系统API端点泄露许可证数据和已安装版本给已认证用户。
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
II. Public POCs for CVE-2026-42051
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Vendor Advisories for CVE-2026-42051 (1)
Vendor Pages for CVE-2026-42051 (1)
Same Patch Batch · getkirby · 2026-05-09 · 4 CVEs total
| CVE-2026-42069 | Kirby: Read access to site, user and role information is not gated by permissions | |
| CVE-2026-42137 | Kirby: `pages.access/list` and `files.access/list` permissions are not consistently checke | |
| CVE-2026-42174 | Kirby: User avatar creation, replacement and deletion are not gated by user update permiss |
IV. Related Vulnerabilities
Same product: kirby
- CVE-2026-45368
Kirby: Cross-site scripting (XSS) from links in KirbyTags an - CVE-2026-45334
Kirby: Content locks disclose IDs and emails of inaccessible - CVE-2026-44175
Kirby: Cross-site scripting (XSS) from list field content in - CVE-2026-44176
Kirby: `pages.access` permission is not checked during rende - CVE-2026-44177
Kirby: Pre-authentication path traversal and PHP file inclus
Same vendor: getkirby
- CVE-2026-45368
Kirby: Cross-site scripting (XSS) from links in KirbyTags an - CVE-2026-45334
Kirby: Content locks disclose IDs and emails of inaccessible - CVE-2026-44175
Kirby: Cross-site scripting (XSS) from list field content in - CVE-2026-44176
Kirby: `pages.access` permission is not checked during rende - CVE-2026-44177
Kirby: Pre-authentication path traversal and PHP file inclus
Same weakness: CWE-862
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Devolutions PowerShell Universal 2026.2.2及之前版本存在访问控制漏洞 - CVE-2026-10033
EventON Action User <= 2.5.14 - Missing Authorization to Una - CVE-2026-12654
Payment Plugins for Stripe WooCommerce <= 4.0.7 - Missing Au - CVE-2026-11354
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V. Comments for CVE-2026-42051
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