The Advanced Product Fields (Product Addons) for WooCommerce plugin for WordPress is vulnerable to Improper Input Validation in all versions up to, and including, 1.6.21. This is due to a logic flaw in the 'validate_cart_data' function. This makes it possible for unauthenticated attackers to bypass required paid addons and complete purchases at the base product price only, effectively stealing products by paying a fraction of the intended total.
The vulnerability was partially patched in version 1.6.19.
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
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://plugins.trac.wordpress.org/browser/advanced-product-fields-for-woocomme…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3477476/
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3483410/
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/5d9c1c3d-6882-4425-8d…
security@wordfence.com