Vulnerabilities / Kadence Blocks / WPSEC-2026-1561
Kadence Blocks <= 3.8.0.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Advanced Button Video Popup Lightbox
Medium 5.4
CWE-79Fixed in 3.8.0.2
- ID
- WPSEC-2026-1561
- Plugin
- Kadence Blocks — Page Builder Toolkit for Gutenberg Editor (kadence-blocks)
- Affected
- from 3.0.9 before 3.8.0.2
- Remediation
- Update to 3.8.0.2 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- Weakness
- CWE-79
- Usage
- Plugin High · Affected versions High among sites WPSec scans, 2026-10-23
- Attack surface
- Kadence Blocks on WPSec AttackSurface
- Fix released
- Published
Description
The Kadence Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Advanced Button block's video popup lightbox in all versions from 3.0.9 up to, and including, 3.8.0.1, due to insufficient sanitization of the lightbox title, description and media attributes of video popup links before they are rendered as HTML by GLightbox. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute when a user opens the video popup.
References
- https://wpsec.com/vuln/WPSEC-2026-1561/
- https://plugins.svn.wordpress.org/kadence-blocks/tags/3.8.0.2/
- https://wordpress.org/plugins/kadence-blocks/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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