Elementor Website Builder <= 4.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via REST API
| CVE | CVE-2026-6127 |
|---|---|
| CVSS | 6.4 (Medium) |
| Publicly Published | April 30, 2026 |
| Last Updated | May 1, 2026 |
| Researcher |
Jonah Burgess (CryptoCat)
|
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.
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for Elementor Website Builder – more than just a page builder
| Software Type | Plugin |
|---|---|
| Software Slug | elementor (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 4.0.5, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Elementor Website Builder – more than just a page builder
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