CVE-2026-15420mediumCWE-22

CVE-2026-15420: medium-severity vulnerability in posimyththemes Nexter Blocks – Gutenberg…

Nexter Blocks <= 5.0.0 - Authenticated (Subscriber+) Path Traversal to Arbitrary CSS/JS File Deletion via 'plus_name' Parameter

Published

Follow this CVE+ Monitor Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.3epss 0.9%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Affected products
posimyththemes · Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder
Related CVEs — posimyththemes Nexter Blocks – Gutenberg…

In the same product, most dangerous first.

CVE-2024-5020MEDIUMMultiple Plugins <= (Various Versions) - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via FancyBox JavaScript LibraryEPSS 0.4%CVE-2026-6740MEDIUMNexter Blocks <= 4.7.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'commentIcon' Block AttributeEPSS 0.3%CVE-2025-8567MEDIUMNexter Blocks <= 4.5.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via Multiple WidgetsEPSS 0.3%