{"id":"CVE-2026-18100","aliases":["EUVD-2026-65315","GHSA-27qv-w87h-69r6"],"status":"published","title":"MetForm \u003c= 4.1.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'mf_form_id' Widget Setting","description":"The MetForm – Contact Form, Survey, Quiz, \u0026 Custom Form Builder for Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'mf_form_id' Widget Setting in all versions up to, and including, 4.1.8 due to insufficient input sanitization and output escaping. 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. The payload bypasses Elementor's save-time wp_kses_post filter because it contains no HTML tags, and MetForm's own str_replace transformation of script tags into JavaScript template literal expressions provides an additional delivery path.","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":"2026-11-10","score":0.00383,"percentile":0.32731,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-08-25T07:39:50Z","modified":"2026-08-26T16:19:05Z","products":[{"vendor":"roxnor","product":"metform – contact form, survey, quiz, conditional forms, form templates \u0026 custom form builder for elementor"}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/976f1f01-ad5d-413e-a208-ae4b71a61502?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/metform/tags/4.1.8/utils/util.php#L605"},{"url":"https://plugins.trac.wordpress.org/browser/metform/tags/4.1.8/controls/form-picker-utils.php#L45"},{"url":"https://plugins.trac.wordpress.org/browser/metform/tags/4.1.8/widgets/form.php#L143"},{"url":"https://plugins.trac.wordpress.org/browser/metform/tags/4.1.4/utils/util.php#L605"},{"url":"https://plugins.trac.wordpress.org/browser/metform/tags/4.1.4/controls/form-picker-utils.php#L45"},{"url":"https://plugins.trac.wordpress.org/browser/metform/tags/4.1.4/widgets/form.php#L143"},{"url":"https://plugins.trac.wordpress.org/changeset?reponame=\u0026new=3639278%40metform%2Ftrunk\u0026old=3618333%40metform%2Ftrunk"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18100"},{"url":"https://github.com/advisories/GHSA-27qv-w87h-69r6"}],"sources":{"cve":[{"id":"CVE-2026-18100","title":"MetForm \u003c= 4.1.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'mf_form_id' Widget Setting","description":"The MetForm – Contact Form, Survey, Quiz, \u0026 Custom Form Builder for Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'mf_form_id' Widget Setting in all versions up to, and including, 4.1.8 due to insufficient input sanitization and output escaping. 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. The payload bypasses Elementor's save-time wp_kses_post filter because it contains no HTML tags, and MetForm's own str_replace transformation of script tags into JavaScript template literal expressions provides an additional delivery path.","status":"published","published":"2026-08-25T07:39:50.408Z","modified":"2026-08-25T18:12:52.098Z","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":"2026-11-02T14:20:12.60856Z"}],"euvd":[{"id":"EUVD-2026-65315","description":"The MetForm – Contact Form, Survey, Quiz, \u0026 Custom Form Builder for Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'mf_form_id' Widget Setting in all versions up to, and including, 4.1.8 due to insufficient input sanitization and output escaping. 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. The payload bypasses Elementor's save-time wp_kses_post filter because it contains no HTML tags, and MetForm's own str_replace transformation of script tags into JavaScript template literal expressions provides an additional delivery path.","status":"published","published":"2026-08-25T07:39:50Z","modified":"2026-08-25T18:12:52Z","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":"2026-11-02T18:01:32.174502Z"}],"ghsa":[{"id":"GHSA-27qv-w87h-69r6","title":"The MetForm – Contact Form, Survey, Quiz, \u0026 Custom Form Builder for Elementor plugin for...","description":"The MetForm – Contact Form, Survey, Quiz, \u0026 Custom Form Builder for Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'mf_form_id' Widget Setting in all versions up to, and including, 4.1.8 due to insufficient input sanitization and output escaping. 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. The payload bypasses Elementor's save-time wp_kses_post filter because it contains no HTML tags, and MetForm's own str_replace transformation of script tags into JavaScript template literal expressions provides an additional delivery path.","status":"published","published":"2026-08-25T09:30:37Z","modified":"2026-08-25T09:30:42Z","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":"2026-11-02T15:10:56.831918Z"}],"nvd":[{"id":"CVE-2026-18100","description":"The MetForm – Contact Form, Survey, Quiz, \u0026 Custom Form Builder for Elementor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'mf_form_id' Widget Setting in all versions up to, and including, 4.1.8 due to insufficient input sanitization and output escaping. 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. The payload bypasses Elementor's save-time wp_kses_post filter because it contains no HTML tags, and MetForm's own str_replace transformation of script tags into JavaScript template literal expressions provides an additional delivery path.","status":"published","published":"2026-08-25T08:18:08.36Z","modified":"2026-08-26T16:19:05.917Z","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":"2026-11-02T14:12:41.018848Z"}]}}