WPForms <= 1.10.2 — Improper Neutralization of CRLF Sequences to Unauthenticated Email Header Injection via Reply-To Display Name
CVE-2026-12127Published · Updated Action summary
Affected: ≤1.10.2Update to 1.10.2.1 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More wpforms-lite
- Affected≤ 1.10.2
- Patched in1.10.2.1
Update to 1.10.2.1 or newer.
You are affected if you run ≤ 1.10.2. Version 1.10.2.1 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 1.10.2.1, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to AlexHenry.
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More
All 28| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤2.0.3Update to 2.0.3.1 | CVE-2026-54851 | |
| Medium5.3 | 2.0.2.1 - Unauthenticated Payment Bypass on Paid Forms 1.10.0.1 – 2.0.2.1Update to 2.0.2.2 | CVE-2026-82844 | |
| Medium4.7 | Reflected Cross-Site Scripting via 'query_var' Smart Tag in iframe srcdoc Attribute ≤2.0.2.1Update to 2.0.2.2 | CVE-2026-101921 | |
| Medium6.1 | Reflected Cross-Site Scripting via 'page_title' POST Parameter ≤2.0.2Update to 2.0.2.1 | CVE-2026-88996 | |
| Medium6.5 | 2.0.2 - Unauthenticated Arbitrary Shortcode Execution 1.5.0.1 – 2.0.2Update to 2.0.2.1 | CVE-2026-84744 |
- High7.2Unauthenticated Stored Cross-Site Scripting
≤2.0.3Update to 2.0.3.1
- Medium5.32.0.2.1 - Unauthenticated Payment Bypass on Paid Forms
1.10.0.1 – 2.0.2.1Update to 2.0.2.2
- Medium4.7Reflected Cross-Site Scripting via 'query_var' Smart Tag in iframe srcdoc Attribute
≤2.0.2.1Update to 2.0.2.2
- Medium6.1Reflected Cross-Site Scripting via 'page_title' POST Parameter
≤2.0.2Update to 2.0.2.1
- Medium6.52.0.2 - Unauthenticated Arbitrary Shortcode Execution
1.5.0.1 – 2.0.2Update to 2.0.2.1
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.