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CVE-2026-6127— Elementor Website Builder <= 4.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via REST API

Quick assessment

Affected
elemntor Elementor Website Builder – more than just a page builder
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Elementor Website Builder 4.0.4及之前版本存在跨站脚本漏洞，该漏洞源于处理表单编码的REST API请求时输入清理不足，当贡献者发送表单编码的PATCH请求时，json_decode()

CVSS 6.4 · Medium EPSS 0.36% · P27

Affected Version Matrix 1

VendorProduct Version RangeStatus
elemntor Elementor Website Builder – more than just a page builder ≤ 4.0.4 affected
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I. Basic Information for CVE-2026-6127

Vulnerability Information
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Vulnerability Title
Elementor Website Builder <= 4.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via REST API
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Elementor Website Builder 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Elementor Website Builder 4.0.4及之前版本存在跨站脚本漏洞，该漏洞源于处理表单编码的REST API请求时输入清理不足，当贡献者发送表单编码的PATCH请求时，json_decode()
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
elemntor Elementor Website Builder – more than just a page builder 0 ~ 4.0.4 -

II. Public POCs for CVE-2026-6127

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III. Intelligence Information for CVE-2026-6127

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Vendor Advisories for CVE-2026-6127 (1)

IV. Related Vulnerabilities

Same product: Elementor Website Builder – more than just a page builder
Same vendor: elemntor
Same weakness: CWE-79

V. Comments for CVE-2026-6127

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