What the vulnerability does
01Description
The Premmerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'premmerce_wizard_actions' AJAX endpoint in all versions up to, and including, 1.3.20. This is due to missing capability checks and insufficient input sanitization and output escaping on the `state` parameter. This makes it possible for authenticated attackers, with subscriber level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page (the Premmerce Wizard admin page).
Explanation of Vulnerability in Simple Terms
02Summary
Premmerce versions up to 1.3.20 contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts affecting other users across the application. The vulnerability has a changed scope, meaning the impact extends beyond the vulnerable component itself. Update to version 1.3.21 or later to remediate.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers and affect the application's functionality.
Potential impact on your site
04Site Impact
Authenticated users can inject scripts affecting other users' sessions, potentially compromising data or site functionality.
Conditions required to exploit
05Prerequisites
Attacker must have a valid user account with low-level privileges; no user interaction required from victims.
Key dates
06Disclosure timeline
February 7, 2026
CVE published
April 8, 2026
Record updated
