CVE-2025-13456

Step 1: Payload Delivery: The attacker crafts a malicious URL containing a JavaScript payload within a specific parameter that the ShopBuilder plugin processes.

Step 2: User Interaction: The attacker lures a privileged user (e.g., an administrator) to click the crafted URL, perhaps through phishing or social engineering.

Step 3: Payload Execution: When the user clicks the malicious URL, the browser sends the request to the vulnerable ShopBuilder plugin. The plugin, due to the lack of sanitization, includes the attacker's JavaScript payload in the response.

Step 4: Code Rendering: The user's browser receives the response containing the malicious JavaScript and executes it.

Step 5: Attack Execution: The executed JavaScript can perform various malicious actions, such as stealing the user's session cookies, redirecting the user to a phishing site, or modifying the website's content.

The vulnerability stems from a lack of proper input sanitization and output escaping within the ShopBuilder plugin. Specifically, a parameter is not correctly processed before being displayed on a webpage. This allows an attacker to inject malicious JavaScript code into the parameter, which is then rendered by the user's browser. The root cause is a missing or inadequate implementation of security best practices, such as input validation and output encoding, leading to the XSS vulnerability.