CVE-2026-1560
Custom Block Builder – Lazy Blocks <= 4.2.0 - Authenticated (Contributor+) Remote Code Execution
- State
- Published
- Severity
- 8.8 High
- Published
- Feb 11, 2026
- Updated
- Apr 8, 2026
- Reserved
- Jan 28, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Wordfence |
Weaknesses
- CWE-94 Improper Control of Generation of Code ('Code Injection')
Affected Products
| Product | Versions |
|---|---|
Custom Block Builder – Lazy Blocksnko |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b1853c88-277b-4955-b042-aeed1cffb49b?source=cve
- 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#L1637
- https://plugins.trac.wordpress.org/browser/lazy-blocks/trunk/classes/class-blocks.php#L766
- https://plugins.trac.wordpress.org/changeset/3454012/
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