Directory Traversal Vulnerability in Nexter Blocks Plugin for WordPress
CVE-2026-15420

4.3MEDIUM

Key Information:

Vendor

WordPress
Status
Nexter Blocks – Gutenberg Blocks, Page Builder & Ai Website Builder
Vendor
CVE Published:
24 July 2026

What is CVE-2026-15420?

The Nexter Blocks plugin for WordPress, which facilitates the creation of websites using Gutenberg blocks and AI tools, is susceptible to a directory traversal flaw. This vulnerability impacts all versions up to and including 5.0.0 and can be exploited by authenticated users with subscriber-level access or higher through the manipulation of the 'plus_name' parameter. Exploiting this issue enables attackers to delete arbitrary JavaScript and CSS files from the server, which could lead to service interruptions and the potential destruction of vital plugin and theme resources.

Affected Version(s)

Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder 0 <= 5.0.0

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/the-plus-addon...
https://plugins.trac.wordpress.org/browser/the-plus-addon...

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wordfence PRISM
.