CVE-2024-11205: WPForms Auth Bypass Vulnerability

CVE-2024-11205 Overview

The WPForms plugin for WordPress contains a critical authorization bypass vulnerability due to a missing capability check on the wpforms_is_admin_page function. This flaw affects versions from 1.8.4 up to and including 1.9.2.1, allowing authenticated attackers with Subscriber-level access and above to perform unauthorized administrative actions including refunding payments and canceling subscriptions through the Stripe payment integration.

Critical Impact

Authenticated users with minimal privileges (Subscriber-level) can manipulate payment data, issue unauthorized refunds, and cancel active subscriptions, potentially causing significant financial damage to WordPress site owners.

Affected Products

• WPForms WordPress Plugin versions 1.8.4 through 1.9.2.1
• WPForms Lite WordPress Plugin (affected versions)
• WordPress sites using WPForms with Stripe payment integration

Discovery Timeline

• 2024-12-10 - CVE-2024-11205 published to NVD
• 2025-08-12 - Last updated in NVD database

Technical Details for CVE-2024-11205

Vulnerability Analysis

This vulnerability is classified as CWE-862 (Missing Authorization). The core issue lies in the wpforms_is_admin_page function located in the plugin's checks.php file, which fails to properly verify user capabilities before allowing access to sensitive payment management functionality.

The missing capability check enables any authenticated user—including those with the minimal Subscriber role—to interact with the Stripe Admin Payments handler. Specifically, the SingleActionsHandler.php component processes refund and subscription cancellation requests without adequately validating that the requesting user has the administrative privileges required for such financial operations.

The vulnerability is exploitable over the network and requires low attack complexity. While the attacker must be authenticated (at minimum Subscriber-level), no user interaction is required to execute the attack. The impact is focused on data integrity, allowing unauthorized modification of payment records without affecting confidentiality or availability directly.

Root Cause

The root cause is a missing authorization check in the wpforms_is_admin_page function. This function is intended to determine whether the current page is an admin page but fails to verify whether the current user has the appropriate capabilities to perform administrative actions on that page. The Stripe payment handlers rely on this flawed check, inadvertently granting payment management capabilities to low-privileged authenticated users.

Attack Vector

An attacker with a valid Subscriber-level account can exploit this vulnerability by crafting requests to the payment management endpoints. The attack flow involves:

1. Authenticating to the WordPress site with any valid user account (Subscriber or higher)
2. Identifying payment or subscription IDs through enumeration or reconnaissance
3. Sending crafted requests to the Stripe payment action handlers
4. The wpforms_is_admin_page function fails to block unauthorized access
5. The SingleActionsHandler.php processes the refund or cancellation request

Since no code examples are available from verified sources, the vulnerability mechanism involves the payment handler accepting AJAX requests or form submissions for refund and cancellation actions. The handler checks if the request originates from an admin page context but does not verify whether the authenticated user possesses administrative capabilities such as manage_options or a custom WPForms capability. Technical details can be found in the WordPress WPForms Stripe Admin Payments Handler source code.

Detection Methods for CVE-2024-11205

Indicators of Compromise

• Unexpected payment refunds or subscription cancellations in Stripe dashboard not initiated by administrators
• WordPress audit logs showing payment-related actions by non-administrative users
• Unusual activity from Subscriber-level accounts accessing payment management endpoints
• Increased API calls to WPForms Stripe integration endpoints from low-privileged user sessions

Detection Strategies

• Monitor WordPress user activity logs for Subscriber or Contributor accounts accessing admin payment functionality
• Review Stripe webhook logs for refund or cancellation events that don't correlate with legitimate administrative actions
• Implement Web Application Firewall (WAF) rules to detect and alert on suspicious requests to WPForms payment endpoints
• Audit user role assignments to identify potentially compromised or malicious Subscriber accounts

Monitoring Recommendations

• Enable comprehensive WordPress audit logging with plugins that track user actions and capability usage
• Configure Stripe dashboard alerts for refund and subscription cancellation events
• Set up real-time monitoring for unexpected HTTP requests to /wp-admin/ endpoints from non-admin user sessions
• Review WPForms form submission and payment logs regularly for anomalous patterns

How to Mitigate CVE-2024-11205

Immediate Actions Required

• Update WPForms to a version newer than 1.9.2.1 immediately
• Audit recent payment activity in Stripe for unauthorized refunds or cancellations
• Review WordPress user accounts and remove unnecessary Subscriber-level accounts
• Temporarily disable the WPForms Stripe integration if immediate patching is not possible

Patch Information

The vulnerability has been addressed by the WPForms development team. The fix is documented in the WordPress WPForms Lite Changeset 3191229. Site administrators should update to the latest version of WPForms through the WordPress plugin repository. The patch adds proper capability checks to ensure only users with appropriate administrative permissions can access payment management functions.

Workarounds

• Restrict user registration on WordPress sites using WPForms with payment functionality until patched
• Use a security plugin to add additional capability checks on WPForms admin endpoints
• Implement IP-based access restrictions for administrative functions as a defense-in-depth measure
• Consider temporarily using an alternative payment form solution until the vulnerable plugin can be updated

# Verify current WPForms version and update via WP-CLI
wp plugin list --name=wpforms --fields=name,version,update_version
wp plugin update wpforms --version=latest

# Alternatively for WPForms Lite
wp plugin list --name=wpforms-lite --fields=name,version,update_version
wp plugin update wpforms-lite