Description
The Elementor Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the _elementor_data meta field in versions up to, and including, 4.0.4. This is due to insufficient input sanitization when processing form-encoded REST API requests. The plugin registers the _elementor_data meta field with show_in_rest but omits a sanitize_callback, relying instead on a rest_pre_insert_post filter (sanitize_post_data function) that only sanitizes JSON-encoded request bodies. When a contributor sends a form-encoded PATCH request to the WordPress REST API, the json_decode() call on the raw body returns null, causing all sanitization to be skipped. The unsanitized data is then stored via update_post_meta() and later output without escaping through multiple widget sinks including the HTML widget's print_unescaped_setting() function. 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.
References8
- plugins.trac.wordpress.org/browser/elementor/tags/4.0.1/include…
- plugins.trac.wordpress.org/browser/elementor/tags/4.0.1/include…
- plugins.trac.wordpress.org/browser/elementor/tags/4.0.1/modules…
- plugins.trac.wordpress.org/browser/elementor/trunk/includes/bas…
- plugins.trac.wordpress.org/browser/elementor/trunk/includes/plu…
- plugins.trac.wordpress.org/browser/elementor/trunk/modules/wp-r…
- plugins.trac.wordpress.org/changeset/3519457/
- www.wordfence.com/threat-intel/vulnerabilities/id/826a2003-c526…
Metrics
- CVSS 3.1
-
6.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 13 · as of 13 November 2026
- CWE
- CWE-79
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