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 'Address Line 1' field in Inventory Locations is 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 'Address Line 1' field in Inventory Locations is not properly sanitized before being displayed in the admin panel.

## Proof of Concept

### Required Permissions - General permissions: - Access the control panel - Access Craft Commerce - Craft Commerce permissions: - Manage inventory locations - An active administrator elevated session

<img width="887" height="832" alt="req-perms" src="https://github.com/user-attachments/assets/7a9a5ef6-4fc3-4af1-8ded-08861ead0b7e" />

### Steps to Reproduce 1. Log in to the Admin Panel with the attacker account with the permissions mentioned above. 2. Navigate to **Commerce** -> **Inventory Locations** -> **Default** (`/admin/commerce/inventory-locations/1`). 3. In the **Address Line 1** field, enter the following payload: ```html <img src=x onerror="alert(document.domain)"> ``` 4. Click **Save** and you'll be redirected back to the **Inventory Locations** page. 5. Notice the alert proving JavaScript execution. <img width="1814" height="606" alt="alert-poc" src="https://github.com/user-attachments/assets/f08aed21-a676-4dee-85a8-d195bab85685" />

### 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…