Custom Block Builder – Lazy Blocks: Code execution
Custom Block Builder – Lazy Blocks is affected by code execution. Exploitation requires at least contributor-level access. Successful exploitation can run attacker-controlled code in the WordPress hosting account.
- Component
- Custom Block Builder – Lazy Blocks
- Plugin slug
lazy-blocks- Affected
- See vendor advisory
- Safe version
- See mitigation notes
- Published
- Feb 11, 2026
This CVE was published Feb 11, 2026 and is one of 3 known issues for this plugin.
Update, patch or deactivate.
Update Custom Block Builder – Lazy Blocks to a release outside the affected range, or disable and remove it until a fixed version is available.
No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical 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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H