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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (8.92%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 8.92% probability · 95th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-94
- Source
- security@wordfence.com
References
- 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/browser/lazy-blocks/trunk/classes/class-rest.php#L88
- https://plugins.trac.wordpress.org/changeset/3454012/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b1853c88-277b-4955-b042-aeed1cffb49b?source=cve
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.