getwpfunnels WPFunnels Plugin up to 3.12.13 on WordPress add_offer_product_to_cart product_id/step_id missing authentication

Summaryinfo

A vulnerability has been found in getwpfunnels WPFunnels Plugin up to 3.12.13 and classified as problematic. This affects the function add_offer_product_to_cart. The manipulation of the argument product_id/step_id leads to missing authentication. This vulnerability is traded as CVE-2026-84908. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in getwpfunnels WPFunnels Plugin up to 3.12.13. It has been rated as problematic. This issue affects the function add_offer_product_to_cart. The manipulation of the argument product_id/step_id with an unknown input leads to a missing authentication vulnerability. Using CWE to declare the problem leads to CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. Impacted is integrity. The summary by CVE is:

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.

It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-84908 since 09/02/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/09/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-74687). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• getwpfunnels

Name

• WPFunnels Plugin

Version

• 3.12.0
• 3.12.1
• 3.12.2
• 3.12.3
• 3.12.4
• 3.12.5
• 3.12.6
• 3.12.7
• 3.12.8
• 3.12.9
• 3.12.10
• 3.12.11
• 3.12.12
• 3.12.13

CPE 2.3info

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CPE 2.2info

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Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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