{"id":"CVE-2026-6127","aliases":["EUVD-2026-26479","GHSA-4w32-4c6r-m74m"],"status":"published","title":"Elementor Website Builder \u003c= 4.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via REST API","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.","severity":{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00225,"percentile":0.13338,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-05-01T05:29:53Z","modified":"2026-06-17T11:00:21Z","products":[{"vendor":"elemntor","product":"elementor website builder – more than just a page builder"}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/826a2003-c526-4760-8c21-10d5ae7bb384?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/elementor/trunk/includes/base/widget-base.php#L794"},{"url":"https://plugins.trac.wordpress.org/browser/elementor/tags/4.0.1/includes/base/widget-base.php#L794"},{"url":"https://plugins.trac.wordpress.org/browser/elementor/trunk/includes/plugin.php#L840"},{"url":"https://plugins.trac.wordpress.org/browser/elementor/tags/4.0.1/includes/plugin.php#L840"},{"url":"https://plugins.trac.wordpress.org/browser/elementor/trunk/modules/wp-rest/classes/elementor-post-meta.php#L68"},{"url":"https://plugins.trac.wordpress.org/browser/elementor/tags/4.0.1/modules/wp-rest/classes/elementor-post-meta.php#L68"},{"url":"https://plugins.trac.wordpress.org/changeset/3519457/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6127"},{"url":"https://plugins.trac.wordpress.org/changeset/3519457"},{"url":"https://github.com/advisories/GHSA-4w32-4c6r-m74m"}],"sources":{"cve":[{"id":"CVE-2026-6127","title":"Elementor Website Builder \u003c= 4.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via REST API","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.","status":"published","published":"2026-05-01T05:29:53.183Z","modified":"2026-05-01T16:37:14.033Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:50:04.986624Z"}],"euvd":[{"id":"EUVD-2026-26479","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.","status":"published","published":"2026-05-01T05:29:53Z","modified":"2026-05-01T16:37:14Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T19:05:18.723006Z"}],"ghsa":[{"id":"GHSA-4w32-4c6r-m74m","title":"The Elementor Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting...","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.","status":"published","published":"2026-05-01T06:30:24Z","modified":"2026-05-01T06:30:25Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:07:52.84276Z"}],"nvd":[{"id":"CVE-2026-6127","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.","status":"published","published":"2026-05-01T06:16:32.233Z","modified":"2026-06-17T11:00:21.053Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:16.626888Z"}]}}