{"id":"CVE-2026-12127","state":"PUBLISHED","title":"WPForms <= 1.10.2 - Improper Neutralization of CRLF Sequences to Unauthenticated Email Header Injection via Reply-To Display Name","description":"The WPForms – Easy Form Builder for WordPress – Contact Forms, Payment Forms, Surveys, & More plugin for WordPress is vulnerable to Improper Neutralization of CRLF Sequences ('CRLF Injection') in all versions up to, and including, 1.10.2 This is due to `get_reply_to_address()` processing the Reply-To display name through smart-tag expansion with context `'notification'` instead of `'notification-reply-to'`, which bypasses email-address validation while `wpforms_sanitize_textarea_field()` intentionally preserves CR/LF characters that are never stripped before the display name is concatenated into the raw `Reply-To:` mail header string. This makes it possible for unauthenticated attackers to inject arbitrary additional email headers — such as `Bcc:` — into outgoing notification emails, silently blind-copying all notification email copies to an attacker-controlled address. Exploitation requires that a form notification is configured to use a Paragraph Text (textarea) field as the Reply-To display name via a Smart Tag.","publishedAt":"2026-07-01T04:32:27.607Z","updatedAt":"2026-07-01T10:42:10.985Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","source":"Wordfence"},"assigner":"Wordfence","products":["smub WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More"],"affected":[{"vendor":"smub","product":"WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.10.2","versionType":"semver"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/d5a51c22-c4ca-4897-ad7e-c5df00b07fe0?source=cve","https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.1.1/src/Emails/Mailer.php#L368","https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.1.1/src/Emails/Notifications.php#L1098","https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.1.1/src/Emails/Notifications.php#L1138","https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.1.1/includes/fields/class-textarea.php#L326","https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.2/src/Emails/Mailer.php#L368","https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.2/src/Emails/Notifications.php#L1098","https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.2/src/Emails/Notifications.php#L1138","https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.2/includes/fields/class-textarea.php#L326","https://plugins.trac.wordpress.org/changeset/3586095/wpforms-lite/trunk/src/Emails/Mailer.php","https://plugins.trac.wordpress.org/changeset?old_path=%2Fwpforms-lite/tags/1.10.2&new_path=%2Fwpforms-lite/tags/1.10.2.1"],"weaknesses":["CWE-93"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/12xxx/CVE-2026-12127.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-12127","state":"PUBLISHED","datePublished":"2026-07-01T04:32:27.607Z","dateUpdated":"2026-07-01T10:42:10.985Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-06-12T15:16:37.220Z"},"containers":{"cna":{"title":"WPForms <= 1.10.2 - Improper Neutralization of CRLF Sequences to Unauthenticated Email Header Injection via Reply-To Display Name","descriptions":[{"lang":"en","value":"The WPForms – Easy Form Builder for WordPress – Contact Forms, Payment Forms, Surveys, & More plugin for WordPress is vulnerable to Improper Neutralization of CRLF Sequences ('CRLF Injection') in all versions up to, and including, 1.10.2 This is due to `get_reply_to_address()` processing the Reply-To display name through smart-tag expansion with context `'notification'` instead of `'notification-reply-to'`, which bypasses email-address validation while `wpforms_sanitize_textarea_field()` intentionally preserves CR/LF characters that are never stripped before the display name is concatenated into the raw `Reply-To:` mail header string. This makes it possible for unauthenticated attackers to inject arbitrary additional email headers — such as `Bcc:` — into outgoing notification emails, silently blind-copying all notification email copies to an attacker-controlled address. Exploitation requires that a form notification is configured to use a Paragraph Text (textarea) field as the Reply-To display name via a Smart Tag."}],"affected":[{"vendor":"smub","product":"WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.10.2","versionType":"semver"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/d5a51c22-c4ca-4897-ad7e-c5df00b07fe0?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.1.1/src/Emails/Mailer.php#L368"},{"url":"https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.1.1/src/Emails/Notifications.php#L1098"},{"url":"https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.1.1/src/Emails/Notifications.php#L1138"},{"url":"https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.1.1/includes/fields/class-textarea.php#L326"},{"url":"https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.2/src/Emails/Mailer.php#L368"},{"url":"https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.2/src/Emails/Notifications.php#L1098"},{"url":"https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.2/src/Emails/Notifications.php#L1138"},{"url":"https://plugins.trac.wordpress.org/browser/wpforms-lite/tags/1.10.0.2/includes/fields/class-textarea.php#L326"},{"url":"https://plugins.trac.wordpress.org/changeset/3586095/wpforms-lite/trunk/src/Emails/Mailer.php"},{"url":"https://plugins.trac.wordpress.org/changeset?old_path=%2Fwpforms-lite/tags/1.10.2&new_path=%2Fwpforms-lite/tags/1.10.2.1"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":5.3,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-93","lang":"en","description":"CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-07-01T04:32:27.607Z"},"credits":[{"lang":"en","type":"finder","value":"Jack Pas (Dark.)"}],"timeline":[{"time":"2026-06-12T15:48:56.000Z","lang":"en","value":"Vendor Notified"},{"time":"2026-06-30T16:02:50.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-12127","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-07-01T10:31:09.519094Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-01T10:42:10.985Z"}}]}}}