EUVD-2026-43163
GHSA-mp2r-c4g7-25w6
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Network-reachable endpoint requires no authentication (PR:N), no special conditions (AC:L), and causes only limited integrity impact via email field overwrite (I:L); scope is unchanged and no confidentiality or availability loss occurs.
Primary rating from Vendor (wordfence).
CVSS VectorVendor: wordfence
Lifecycle Timeline
2DescriptionCVE.org
The NEX-Forms - Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 9.2.2. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to overwrite the saved_admin_email, saved_user_email, and saved_user_email_address fields of arbitrary form entries belonging to other users, and cause the site to dispatch attacker-controlled email content to attacker-chosen recipient addresses.
AnalysisAI
Authorization bypass in the NEX-Forms WordPress plugin (all versions through 9.2.2) allows unauthenticated remote attackers to overwrite email metadata fields on arbitrary form entries and weaponize the victim WordPress site as an outbound email relay. The CVSS vector (PR:N/AC:L/AV:N) confirms zero authentication and zero configuration prerequisites beyond plugin activation. No public exploit has been identified at time of analysis, but the trivially low exploitation complexity makes mass scanning and abuse for phishing or spam distribution operationally realistic at scale.
Technical ContextAI
The root cause is CWE-862 (Missing Authorization) - the plugin's main.php file processes HTTP requests to update form entry email fields without verifying the caller holds any WordPress capability to perform that action. NVD source references pin the flawed logic to lines 2663, 4636, and 5288 of main.php, present in at least plugin tags 9.1.10 and 9.1.13. WordPress plugins are expected to gate write operations behind capability checks such as current_user_can() or nonce verification tied to a logged-in session; the absence of such checks here means any anonymous HTTP request can invoke the affected code paths. The three vulnerable fields - saved_admin_email, saved_user_email, and saved_user_email_address - control where the plugin dispatches email notifications for form submissions, enabling an unauthenticated actor to redirect or forge outbound mail content and recipients.
RemediationAI
An upstream code fix is available via WordPress plugin repository changeset 3584399 (https://plugins.trac.wordpress.org/changeset?reponame=&old=3584399%40nex-forms-express-wp-form-builder&new=3584399%40nex-forms-express-wp-form-builder); however, a specific released fixed version number is not independently confirmed from the available input data - verify the current version in the WordPress.org plugin directory and update to any version above 9.2.2 once officially available. Wordfence Firewall users should check the advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/0af9df66-8d82-4ae8-85a1-656d8ea40a7a for virtual patching rule coverage in the interim. As a compensating control, a WAF rule blocking unauthenticated POST requests to the plugin's AJAX action handlers for email-field updates will block exploitation without disabling the plugin entirely, though it may break legitimate workflows if those handlers are shared with authenticated flows. If NEX-Forms is not actively in use, deactivating the plugin eliminates the attack surface with no operational impact.
The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow remote attackers to pass extra para
The isMail transport in PHPMailer before 5.2.20 might allow remote attackers to pass extra parameters to the mail comman
The Backup Migration plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1
The Hash Form - Drag & Drop Form Builder plugin for WordPress is vulnerable to arbitrary file uploads due to missing fil
Authentication bypass in the LiteSpeed Cache WordPress plugin (versions prior to 6.5.0.1) allows unauthenticated remote
The GiveWP - Donation Plugin and Fundraising Platform plugin for WordPress is vulnerable to PHP Object Injection in all
The Simple File List plugin for WordPress through version 4.2.2 contains an unauthenticated remote code execution vulner
The AI Engine WordPress plugin through version 3.1.3 exposes Bearer Token values through the /mcp/v1/ REST API endpoint
The SureTriggers WordPress plugin through version 1.0.82 contains a privilege escalation vulnerability that allows unaut
The Ninja Forms plugin before 2.9.42.1 for WordPress allows remote attackers to conduct PHP object injection attacks via
The Business Directory Plugin - Easy Listing Directories for WordPress plugin for WordPress is vulnerable to time-based
Remote code execution in WordPress 6.9.x (before 6.9.5) and 7.0.x (before 7.0.2) arises from a REST API batch endpoint r
Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today