CVE-2026-1560— Custom Block Builder – Lazy Blocks <= 4.2.0 - Authenticated (Contributor+) Remote Code Execution
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I. Basic Information for CVE-2026-1560
Vulnerability Information
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Vulnerability Title
Custom Block Builder – Lazy Blocks <= 4.2.0 - Authenticated (Contributor+) Remote Code Execution
Source: NVD (National Vulnerability Database)
Vulnerability Description
The Custom Block Builder – Lazy Blocks plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 4.2.0 via multiple functions in the 'LazyBlocks_Blocks' class. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute code on the server.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin Custom Block Builder – Lazy Blocks 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Custom Block Builder – Lazy Blocks 4.2.0及之前版本存在代码注入漏洞，该漏洞源于LazyBlocks_Blocks类中的多个函数存在缺陷，可能导致远程代码执行。
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 |
|---|---|---|---|---|
| nko | Custom Block Builder – Lazy Blocks | * ~ 4.2.0 | - |
II. Public POCs for CVE-2026-1560
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | None | https://github.com/Z3YR0xX/CVE-2026-1560-Authenticated-Remote-Code-Execution-in-Lazy-Blocks-4.2.0 | POC Details |
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IV. Related Vulnerabilities
Same weakness: CWE-94
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V. Comments for CVE-2026-1560
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