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)
- Affected
- all versions before 2.0.4
- Remediation
- Update to 2.0.4 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-20
- Usage
- Plugin High · Affected versions High among sites WPSec scans, 2026-11-06
- Attack surface
- WPForms on WPSec AttackSurface
- Fix released
- Published
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 '[email protected],[email protected],{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/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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