CVE-2026-19914: Welcart e-Commerce <= 2.12.1 - Unauthenticated Stored Cross-Site Scripting via 'custom_order' Parameter
The Welcart e-Commerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'customorder' 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.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue, and what interaction is required?
Any unauthenticated attacker can submit a malicious value through the guest checkout form using the custom_order parameter. The payload executes when an administrator opens the affected order in the WordPress admin panel.
Are default guest checkout deployments exposed?
Deployments that allow guest checkout are exposed because the payload is delivered through the guest checkout form and requires no authentication.
Which versions are affected?
All Welcart e-Commerce plugin for WordPress versions up to and including 2.12.1 are affected.
What is the impact if exploitation succeeds?
An attacker can store arbitrary web script in an order record. That script runs in the browser of an administrator who views the affected order, with confidentiality and integrity impacts indicated by the advisory.