CVE-2026-1560

high

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.

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/b1853c88-277b-4955-b042-aeed1cffb49b?source=cve

https://plugins.trac.wordpress.org/changeset/3454012/

https://plugins.trac.wordpress.org/browser/lazy-blocks/trunk/classes/class-rest.php#L88

https://plugins.trac.wordpress.org/browser/lazy-blocks/trunk/classes/class-blocks.php#L766

https://plugins.trac.wordpress.org/browser/lazy-blocks/trunk/classes/class-blocks.php#L1637

Details

Source: Mitre, NVD

Published: 2026-02-11

Updated: 2026-02-11

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00241