CVE-2025-54739: Posimyth Nexter Blocks

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

Missing Authorization vulnerability in POSIMYTH Nexter Blocks the-plus-addons-for-block-editor allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Nexter Blocks: from n/a through <= 4.5.4.

Affected products

• Posimyth Nexter Blocks: up to and including 4.5.4

Published 2025-08-14. Last modified 2026-06-17.