CVE-2026-12127 Other in WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More
Unauthenticated attackers can inject email headers into WPForms notifications if a textarea field is used for the Reply-To display name, allowing silent BCC to attacker addresses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12127?
CVE-2026-12127 is a medium-severity vulnerability in smub WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More, published on 1 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-93
Which versions are affected by CVE-2026-12127?
How do I fix CVE-2026-12127?
No fix has been published for CVE-2026-12127 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-12127 being exploited?
There is no known exploitation of CVE-2026-12127 in the wild and no public exploit code.
Sources
Also known as GHSA-95c2-pg6v-7hqp.