{"id":"CVE-2026-86833","aliases":["EUVD-2026-94193","GHSA-fv77-662p-ggvf"],"status":"published","title":"MetForm \u003c 4.3.1 - Unauthenticated HTML Injection in Notification Emails via Field Shortcodes","description":"The MetForm WordPress plugin before 4.3.1 does not sanitize or escape submitted form-field values before inserting them into the HTML body of its email notifications, allowing unauthenticated attackers to inject arbitrary markup into the administrator and submitter notification emails the site sends.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00162,"percentile":0.05458,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-74"],"published":"2026-10-07T06:47:51Z","modified":"2026-10-07T14:52:43Z","products":[{"vendor":"unknown","product":"metform"},{"vendor":"xpeedstudio","product":"metform"}],"references":[{"url":"https://wpscan.com/vulnerability/6d6850d6-6fdf-4b97-9ccb-c90f9ed01ab0/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86833"},{"url":"https://wpscan.com/vulnerability/6d6850d6-6fdf-4b97-9ccb-c90f9ed01ab0"},{"url":"https://github.com/advisories/GHSA-fv77-662p-ggvf"}],"sources":{"cve":[{"id":"CVE-2026-86833","title":"MetForm \u003c 4.3.1 - Unauthenticated HTML Injection in Notification Emails via Field Shortcodes","description":"The MetForm WordPress plugin before 4.3.1 does not sanitize or escape submitted form-field values before inserting them into the HTML body of its email notifications, allowing unauthenticated attackers to inject arbitrary markup into the administrator and submitter notification emails the site sends.","status":"published","published":"2026-10-07T06:47:51.929Z","modified":"2026-10-07T09:49:40.451Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T13:49:53.818886Z"}],"euvd":[{"id":"EUVD-2026-94193","description":"The MetForm WordPress plugin before 4.3.1 does not sanitize or escape submitted form-field values before inserting them into the HTML body of its email notifications, allowing unauthenticated attackers to inject arbitrary markup into the administrator and submitter notification emails the site sends.","status":"published","published":"2026-10-07T06:47:51Z","modified":"2026-10-07T09:49:40Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T17:27:35.926265Z"}],"ghsa":[{"id":"GHSA-fv77-662p-ggvf","title":"The MetForm WordPress plugin before 4.3.1 does not sanitize or escape submitted form-field values...","description":"The MetForm WordPress plugin before 4.3.1 does not sanitize or escape submitted form-field values before inserting them into the HTML body of its email notifications, allowing unauthenticated attackers to inject arbitrary markup into the administrator and submitter notification emails the site sends.","status":"published","published":"2026-10-07T09:32:20Z","modified":"2026-10-07T12:31:58Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T15:12:54.084372Z"}],"nvd":[{"id":"CVE-2026-86833","description":"The MetForm WordPress plugin before 4.3.1 does not sanitize or escape submitted form-field values before inserting them into the HTML body of its email notifications, allowing unauthenticated attackers to inject arbitrary markup into the administrator and submitter notification emails the site sends.","status":"published","published":"2026-10-07T07:17:01.73Z","modified":"2026-10-07T14:52:43.42Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-74"],"updated_at":"2026-11-02T14:12:54.809359Z"}]}}