# Elementor Website Builder <= 4.3.4 - Authenticated (Author+) Stored Cross-Site Scripting via SVG CDATA Sections

- **ID:** WPSEC-2026-0903
- **Plugin:** Elementor Website Builder – more than just a page builder (`elementor`), https://wordpress.org/plugins/elementor/
- **Affected versions:** all versions before 4.3.5
- **Fixed in:** 4.3.5 (Update to 4.3.5 or later.)
- **Severity:** Medium 4.9 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin High, affected versions High (as of 2026-10-14)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/elementor
- **Fix released:** 2026-10-13
- **Published:** 2026-10-14
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0903/

## Description

The Elementor Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via uploaded SVG files in all versions up to, and including, 4.3.4, due to the SVG sanitizer not processing CDATA sections inside allowed elements, so they are output unchanged when the SVG is inlined into a page. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses a page where the SVG is rendered inline. Exploitation requires that Elementor's unfiltered file uploads setting be enabled.

## References

- https://wpsec.com/vuln/WPSEC-2026-0903/
- https://plugins.svn.wordpress.org/elementor/tags/4.3.5/
- https://wordpress.org/plugins/elementor/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0903/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.