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HIGH

CVE-2026-1560

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

CVSS v3

8.8

HIGH

EPSS Score

8.9 %

exploit probability, as of 2026-09-25

CISA KEV

No

known exploited

Exploitation

none

SSVC status

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.

Technical details

Published
2026-02-11
Last Modified
2026-04-14

Frequently asked questions

What is CVE-2026-1560?

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.

Is CVE-2026-1560 actively exploited?

Active exploitation of CVE-2026-1560 has not been confirmed. Its EPSS score was 8.9% on 2026-09-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-1560?

CVE-2026-1560 has a CVSS v3 base score of 8.8 (HIGH severity).

Is CVE-2026-1560 affecting your environment?

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