CVE-2025-8567

MEDIUM

Nexter Blocks < 4.5.4 - Authenticated Stored Cross-Site Scripting via Widget Attributes

Title source: llm

Description

The Nexter Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple widgets in all versions up to, and including, 4.5.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

References (3)

Core 3

Core References

Product

https://plugins.trac.wordpress.org/changeset/3342664/

Product

https://wordpress.org/plugins/the-plus-addons-for-block-editor/#developers

Third Party Advisory

https://www.wordfence.com/threat-intel/vulnerabilities/id/ca9ad8ca-aad1-4950-b540-64ffc4a07c12?source=cve

Scores

CVSS v3 6.4

EPSS 0.0022

EPSS Percentile 12.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (2)

posimyththemes/Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder < 4.5.4

posimyththemes/Nexter Blocks – WordPress Gutenberg Blocks & 1000+ Starter Templates < 4.5.4

Published Aug 19, 2025

Tracked Since Feb 18, 2026