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CVE-2026-1560— Custom Block Builder – Lazy Blocks <= 4.2.0 - Authenticated (Contributor+) Remote Code Execution

Quick assessment

Affected
nko Custom Block Builder – Lazy Blocks
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 8.8 · High EPSS 8.92% · P95
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
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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III. Intelligence Information for CVE-2026-1560

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Patches & Fixes for CVE-2026-1560 (3)

IV. Related Vulnerabilities

Same vendor: nko
Same weakness: CWE-94

V. Comments for CVE-2026-1560

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