CVE-2026-1560
Remote Code Execution in Lazy Blocks WordPress Plugin
Publication date: 2026-02-11
Last updated on: 2026-02-11
Assigner: Wordfence
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| wordfence | lazy_blocks | to 4.2.0 (inc) |
| wordfence | lazy_blocks | 4.2.1 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-94 | The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. |
Attack-Flow Graph
AI Powered Q&A
How can this vulnerability impact me? :
This vulnerability can have severe impacts as it allows attackers with relatively low privileges (Contributor-level access) to execute arbitrary code on the server hosting the WordPress site. This can lead to full compromise of the server, including unauthorized data access, data modification, defacement of the website, installation of malware, or further attacks on the network.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate the Remote Code Execution vulnerability in the Custom Block Builder – Lazy Blocks plugin for WordPress (CVE-2026-1560), you should immediately update the plugin to version 4.2.1 or later.
Version 4.2.1 addresses the vulnerability by improving media control components, enhancing error handling, and updating UI elements to prevent potential exploitation related to media uploads and data serialization.
Applying this update will secure the plugin against the vulnerability that allows authenticated attackers with Contributor-level access and above to execute code on the server.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
Can you explain this vulnerability to me?
The Custom Block Builder – Lazy Blocks plugin for WordPress has a Remote Code Execution (RCE) vulnerability in all versions up to and including 4.2.0. This vulnerability exists in multiple functions within the 'LazyBlocks_Blocks' class. It allows authenticated attackers with Contributor-level access or higher to execute arbitrary code on the server.