Elementor Website Builder <= 4.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via REST API
Summary
| CVE | CVE-2026-6127 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-01 06:16:32 UTC |
| Updated | 2026-05-01 06:16:32 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 6.4 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 6.4 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| 3.1 | CNA | DECLARED | 6.4 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
ChangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Elemntor | Elementor Website Builder More Than Just A Page Builder | affected 4.0.4 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.wordfence.com/threat-intel/vulnerabilities/id/826a2003-c526-4760-8c21-10d5a... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/elementor/trunk/includes/base/widget-base.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/elementor/tags/4.0.1/includes/plugin.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/elementor/tags/4.0.1/modules/wp-rest/classes/elemento... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/elementor/trunk/includes/plugin.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/elementor/trunk/modules/wp-rest/classes/elementor-pos... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/elementor/tags/4.0.1/includes/base/widget-base.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset/3519457 | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Jonah Burgess (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-04-12T03:16:09.000Z | Vendor Notified |
| CNA | 2026-04-30T00:00:00.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.