Craft Commerce is an ecommerce platform for Craft CMS. In versions from 4.0.0-RC1 to 4.10.0 and from 5.0.0 to 5.5.1, a stored XSS vulnerability in Craft Commerce allows attackers to execute malicious JavaScript in an administrator’s browser. This occurs because the Name & Description fields in Tax Zones are not properly sanitized before being displayed in the admin panel. This issue has been patched in versions 4.10.1 and 5.5.2.

Affected: Packagist: craftcms/commerce

## Summary A stored XSS vulnerability in Craft Commerce allows attackers to execute malicious JavaScript in an administrator’s browser. This occurs because the **Name & Description** fields in **Tax Zones** are not properly sanitized before being displayed in the admin panel.

## Proof of Concept

### Requirments - General permissions: - Access the control panel - Access Craft Commerce - Craft Commerce permissions: - Manage store settings - Manage taxes - An active administrator elevated session

### Steps to Reproduce 1. Log in to the Admin Panel with the attacker account with the permissions mentioned above. 2. Navigate to **Commerce** -> **Store Management** -> **Tax Zones** (`/admin/commerce/store-management/primary/taxzones`). 3. Create a new tax zone. 4. In the **Name** or **Description** field, enter the following payload: ```html <img src=x onerror="alert(document.domain)"> ``` 4. Click **Save** and you’ll be redirected back to the previous page. 5. Notice the alert proving JavaScript execution. <img width="1904" height="418" alt="poc" src="https://github.com/user-attachments/assets/09bd993b-550e-40fe-b2d7-1608e25fbc01" />

### Privilege Escalation to Administrator: 1. Do the same steps above, but replace the payload with a malicious one. 2. The following payload elevates the attacker’s account to Admin if there’s already an elevated session, replace the `<UserID>` with your attacker id: 3. ```html <img src=x onerror="fetch('/admin/users/<UserID>/permissions',{…