Elementor Website Builder <= 4.3.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via Inline Post CSS
- ID
- WPSEC-2026-0902
- Plugin
- Elementor Website Builder – more than just a page builder (elementor)
- Affected
- all versions before 4.3.5
- Remediation
- Update to 4.3.5 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
- Weakness
- CWE-79
- Usage
- Plugin High · Affected versions High among sites WPSec scans, 2026-10-14
- Attack surface
- Elementor Website Builder on WPSec AttackSurface
- Fix released
- Published
Description
The Elementor Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via post CSS in all versions up to, and including, 4.3.4 due to insufficient neutralization of '</style' sequences when generated post CSS is printed inline inside a style tag. This makes it possible for authenticated attackers, with contributor-level access and above who can edit posts with Elementor, to close the style tag and inject arbitrary web scripts that execute whenever a user accesses the affected page. Exploitation requires that post CSS be printed inline, such as when Internal CSS Embedding is used.
References
- https://wpsec.com/vuln/WPSEC-2026-0902/
- https://plugins.svn.wordpress.org/elementor/tags/4.3.5/
- https://wordpress.org/plugins/elementor/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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