What the vulnerability does
01Description
The AffiliateX – Amazon Affiliate Plugin plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the save_customization_settings AJAX action in versions 1.0.0 to 1.3.9.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to store arbitrary JavaScript that executes whenever an AffiliateX block renders on the site.
Explanation of Vulnerability in Simple Terms
02Summary
AffiliateX – Amazon Affiliate Plugin versions 1.0.0 through 1.3.9.3 lack proper authorization checks, allowing authenticated users with low privileges to access or modify data they should not be able to reach. The vulnerability affects multiple components due to scope change. Site administrators should update to a version newer than 1.3.9.3 as soon as possible.
What an attacker can do
03Attacker Capabilities
Read or modify data belonging to other users or site sections without proper permission.
Potential impact on your site
04Site Impact
Affiliate data, commissions, or user information may be exposed or altered by low-privilege users.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the site (e.g., subscriber or contributor role).
Key dates
06Disclosure timeline
January 15, 2026
CVE published
January 15, 2026
Record updated