Lazy Blocks Vulnerabilities

The Custom Block Builder – Lazy Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to 4.3.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in p...

CVSS:

4.4

Affected:

up to 4.3.0

Fixed in:

4.3.0

Disclosed:

Jun 11, 2026

CVE-2026-8981 on NVD →

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 serv...

CVSS:

8.8

Affected:

up to 4.2.0

Fixed in:

4.2.1

Disclosed:

Feb 10, 2026

CVE-2026-1560 on NVD →

The Lazy Blocks plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the maybe_export_json() function in versions up to, and including, 4.1.0. This makes it possible for authenticated attackers, with contributor-level access and above, to export block data.

CVSS:

4.3

Affected:

up to 4.1.0

Fixed in:

4.1.1

Disclosed:

Sep 22, 2025

CVE-2025-58258 on NVD →

The Custom Block Builder – Lazy Blocks plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in all versions up to, and including, 3.8.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute i...

CVSS:

6.1

Affected:

up to 3.8.2

Fixed in:

3.8.3

Disclosed:

Feb 4, 2025

CVE-2024-12878 on NVD →