CVE-2025-5844

MEDIUM

Radius Blocks <2.2.1 - XSS

Title source: llm

Description

The Radius Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘subHeadingTagName’ parameter in all versions up to, and including, 2.2.1 due to insufficient input sanitization and output escaping. 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.

Exploits (1)

nomisec WRITEUP

by KeyFrame-Bytes · poc

https://github.com/KeyFrame-Bytes/CVE-2025-5844

View Code ZIP pw:eip

References (3)

[Product] https://plugins.trac.wordpress.org/browser/radius-blocks/tags/2.2.1/templates/blocks/advanced-heading/layout.php#L29

[Product] https://wordpress.org/plugins/radius-blocks/#developers

[Third Party Advisory] https://www.wordfence.com/threat-intel/vulnerabilities/id/ff41796a-0ba8-468f-8b79-274064da154e?source=cve

Scores

CVSS v3 6.4

EPSS 0.0003

EPSS Percentile 10.3%

Attack Vector NETWORK

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

Details

CWE

CWE-79

Status published

Products (1)

techlabpro1/Radius Blocks – WordPress Gutenberg Blocks < 2.2.1

Published Aug 15, 2025

Tracked Since Feb 18, 2026