What the vulnerability does
01Description
The Welcart e-Commerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'custom_order' parameter in all versions up to, and including, 2.12.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The injected payload is delivered via the guest checkout form, requiring no authentication, and executes when an administrator views the affected order in the WordPress admin panel.
Explanation of Vulnerability in Simple Terms
02Summary
Welcart e-Commerce versions up to 2.12.1 contain a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into the application. The vulnerability can be exploited remotely without authentication or user interaction. An attacker can inject code that affects multiple users or components of the site, potentially stealing session data or performing actions on behalf of victims.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that runs in other users' browsers and affects site functionality.
Potential impact on your site
04Site Impact
Attackers can steal customer session tokens, deface pages, redirect users, or capture form data without your knowledge.
Conditions required to exploit
05Prerequisites
Network access to the Welcart installation; no authentication or user interaction required.
Key dates
06Disclosure timeline
September 1, 2026
CVE published
September 1, 2026
Record updated
