CVE-2026-15420
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk45th percentile - higher than 45% of all known CVEs
Summary
The Nexter Blocks plugin for WordPress up to version 5.0.0 has a directory traversal vulnerability via the 'plus_name' parameter. Authenticated attackers with subscriber-level access or higher can delete arbitrary JS/CSS files on the server.
Risk Assessment
An attacker can delete critical JS/CSS files, leading to denial of service or destruction of important plugin and theme assets.
Recommendation
Update the Nexter Blocks plugin to version 5.0.1 or later if available.
Other vulnerabilities in Nexter Blocks
See all- CVE-2025-15678Medium
The Nexter Blocks WordPress plugin before version 5.0.2 does not sanitize uploaded SVG files and allows SVG uploads for any user able to upload files (Author by default). This allows them to upload a file containing malicious JavaScript that executes when the file is accessed, leading to Stored Cross-Site Scripting.
- CVE-2026-6740Medium
The Nexter Blocks plugin for WordPress up to version 4.7.4 is vulnerable to Stored Cross-Site Scripting via the 'commentIcon' parameter due to insufficient input sanitization and output escaping. Authenticated attackers with contributor-level access or higher can inject arbitrary scripts that execute when a user visits an affected page.
- CVE-2026-39516Medium
The Nexter Blocks WordPress plugin exposes sensitive system information to unauthorized entities. The vulnerability allows retrieval of embedded sensitive data.
Original NVD description (English source)
The Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 5.0.0 via the 'plus_name' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete arbitrary JS/CSS files on the server, which can lead to denial of service or destruction of critical plugin and theme assets.