CVE-2026-1560

HIGH

WordPress Lazy Blocks <4.2.0 - Authenticated RCE

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2026-1560. PoCs published by XiaomingX, Z3YR0xX.

AI-analyzed exploit summary This repository contains a functional Python PoC for CVE-2026-1560, an authenticated RCE vulnerability in the Custom Block Builder – Lazy Blocks WordPress plugin (≤ 4.2.0). The exploit leverages a REST API endpoint that allows Contributor+ users to execute arbitrary PHP code via unsanitized block attributes.

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.

Exploits (2)

github WORKING POC 10 stars
by XiaomingX · pythonpoc
https://github.com/XiaomingX/data-cve-poc-py-v1/tree/main/2026/CVE-2026-1560

This repository contains a functional Python PoC for CVE-2026-1560, an authenticated RCE vulnerability in the Custom Block Builder – Lazy Blocks WordPress plugin (≤ 4.2.0). The exploit leverages a REST API endpoint that allows Contributor+ users to execute arbitrary PHP code via unsanitized block attributes.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Custom Block Builder – Lazy Blocks WordPress plugin ≤ 4.2.0
Auth required
Prerequisites: WordPress site with Lazy Blocks plugin ≤ 4.2.0 · Contributor+ credentials
devstral-2 · analyzed Feb 27, 2026 Full analysis →
nomisec WORKING POC 1 stars
by Z3YR0xX · poc
https://github.com/Z3YR0xX/CVE-2026-1560-Authenticated-Remote-Code-Execution-in-Lazy-Blocks-4.2.0

This repository contains a functional proof-of-concept exploit for CVE-2026-1560, an authenticated remote code execution vulnerability in the Custom Block Builder – Lazy Blocks WordPress plugin (versions ≤ 4.2.0). The exploit leverages a REST API endpoint to execute arbitrary PHP code via an `eval()` sink, accessible to users with Contributor-level privileges.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Custom Block Builder – Lazy Blocks ≤ 4.2.0
Auth required
Prerequisites: WordPress site with vulnerable plugin installed · Valid Contributor+ credentials
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

CVSS v3 8.8
EPSS 0.0909
EPSS Percentile 94.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-94
Status published
Products (1)
nko/Custom Block Builder – Lazy Blocks < 4.2.0
Published Feb 11, 2026
Tracked Since Feb 18, 2026