CVE-2026-1560
Custom Block Builder – Lazy Blocks <= 4.2.0 - Authenticated (Contributor+) Remote Code Execution
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-94 |
| Vendor | nko |
| Product | custom block builder – lazy blocks |
| Published | Feb 11, 2026 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
nko / Custom Block Builder – Lazy Blocks
0 ≤ 4.2.0
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/b1853c88-277b-4955-b042-aeed1cffb49b?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/lazy-blocks/trunk/classes/class-rest.php#L88 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/lazy-blocks/trunk/classes/class-blocks.php#L1637 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/lazy-blocks/trunk/classes/class-blocks.php#L766 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3454012/
Credits
Youssef Elouaer