CVE-2026-84908: CWE-862 Missing Authorization in getwpfunnels WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell
Description
The WPFunnels plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 3.12.13. This is due to the plugin registering the 'wpfnl_load_payment' AJAX action for both authenticated and unauthenticated (wp_ajax_nopriv_) users and the underlying add_offer_product_to_cart() function performing no nonce verification, no capability check, and no validation that the attacker-supplied product_id is the offer product actually configured on the attacker-supplied step_id. This makes it possible for unauthenticated attackers to add arbitrary WooCommerce products to a cart at any discounted price configured on any funnel step, enabling price manipulation and revenue loss at checkout.
CVSS v3.1
5.3medium
Affected software
getwpfunnels
WPFunnels – Funnel Builder for WooCommerce with Checkout & One Click Upsell
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The WPFunnels WordPress plugin is vulnerable due to the 'wpfnl_load_payment' AJAX action being accessible to both authenticated and unauthenticated users without proper authorization controls. The underlying function add_offer_product_to_cart() lacks nonce verification, capability checks, and validation that the product_id corresponds to the configured offer product for the specified funnel step_id. This missing authorization (CWE-862) enables unauthenticated attackers to manipulate cart contents by adding arbitrary products at discounted prices from any funnel step.
Potential Impact
Unauthenticated attackers can add arbitrary WooCommerce products to a victim's cart at discounted prices configured in funnel steps, leading to price manipulation and potential financial loss for the store owner. There is no impact on confidentiality or availability reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the AJAX action 'wpfnl_load_payment' to authenticated users only and implement nonce verification and capability checks in the add_offer_product_to_cart() function to ensure proper authorization and validation of product and funnel step IDs.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 09/02/2026
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa0f0a5acd9273b49ccdede
Added to database: 09/09/2026, 05:37:41 UTC
Last enriched: 09/09/2026, 05:52:41 UTC
Last updated: 10/24/2026, 08:45:13 UTC
Views: 68
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