Threat intelligence

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

CVE-2026-1560 · lazy-blocks

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Lazy Blocks at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Custom Block Builder – Lazy Blocks <= 4.2.0 - Authenticated (Contributor+) Remote Code Execution
Affected software: lazy-blocks(Plugin)
Affected versions: ≤ 4.2.0
Authentication: Authenticated (see advisory title)
Vulnerability type: Remote code execution
CVE: CVE-2026-1560
Published: 10 February 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow attackers to run arbitrary code on the server if exploited.
Source: Data imported from Wordfence Intelligence (advisory b1853c88-277b-4955-b042-aeed1cffb49b). Methodology and redistribution notes

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