# WPForms <= 2.0.3.1 - Unauthenticated Email Field Validation Bypass to Notification Recipient Injection

- **ID:** WPSEC-2026-2656
- **Plugin:** WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More (`wpforms-lite`), https://wordpress.org/plugins/wpforms-lite/
- **Affected versions:** all versions before 2.0.4
- **Fixed in:** 2.0.4 (Update to 2.0.4 or later.)
- **Severity:** Low 3.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-20
- **Usage among sites WPSec scans:** plugin High, affected versions High (as of 2026-11-06)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/wpforms-lite
- **Fix released:** 2026-11-05
- **Published:** 2026-11-06
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2656/

## Description

The WPForms plugin for WordPress is vulnerable to Email Validation Bypass via the Email field in all versions up to, and including, 2.0.3.1, due to the wpforms_is_email() function accepting any value containing a '{...}' smart tag pattern as a valid email address, including values submitted by visitors in the Email field. This makes it possible for unauthenticated attackers to submit an arbitrary comma-separated list of addresses (for example 'a@example.com,b@example.com,{x}') as an email, which, on forms whose notification Send To or CC setting uses that Email field, causes the site to send the notification email to multiple attacker-chosen recipients.

## References

- https://wpsec.com/vuln/WPSEC-2026-2656/
- https://plugins.svn.wordpress.org/wpforms-lite/tags/2.0.4/
- https://wordpress.org/plugins/wpforms-lite/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2656/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.