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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
getwpfunnels:wpfunnels – funnel builder for woocommerce with checkout & one click upsell
References 8
https://plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.12/includes/core…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.12/includes/core…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.12/includes/core…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.13/includes/core…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.13/includes/core…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/wpfunnels/tags/3.12.13/includes/core…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset?reponame=&old=3675200%40wpfunnels&…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/5a24d442-56f9-4f6d-bf…
security@wordfence.com