CVE-2025-13439

The Fancy Product Designer plugin for WordPress (versions up to and including 6.5.2) is vulnerable to stored cross-site scripting via the 'elements[].title' parameter in shortcode orders due to insufficient input sanitization and output escaping. An unauthenticated attacker can inject arbitrary web scripts that execute when a user visits an injected page. The injected payload is written to the DOM via innerHTML within the beforeElementAdd JavaScript event handler when processing the elements[].title field from the stored order JSON, meaning execution occurs specifically when an administrator reviews shortcode orders in the WordPress admin panel.

The Fancy Product Designer plugin for WordPress (versions up to and including 6.5.2) is vulnerable to Stored Cross-Site Scripting via 'productTitle' in '_fpd_data' Order Item Meta. The fpd_save_order AJAX action is registered for unauthenticated users without nonce or capability checks, and the strip_tags() sanitization is bypassed using JSON unicode escape sequences that json_decode() converts back to angle brackets when the order is rendered in the admin view.

The Fancy Product Designer plugin for WordPress (versions up to and including 6.5.2) is vulnerable to Stored Cross-Site Scripting via the 'output_format' parameter due to insufficient input sanitization and output escaping. An unauthenticated attacker can inject arbitrary scripts into pages that execute when a user visits the injected page. This requires the Pro Export/Genius feature to be enabled, as the vulnerable fpd_pr_export AJAX action is only registered when that feature is active.

The Fancy Product Designer plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to and including 6.4.8 due to a time-of-check/time-of-use (TOCTOU) race condition in the 'url' parameter of the fpd_custom_uplod_file AJAX action. The plugin validates the URL by calling getimagesize() first, then later retrieves the same URL using file_get_contents(). This allows unauthenticated attackers to exploit the timing gap to perform SSRF attacks by serving a valid image during validation, then changing the response to redirect to arbitrary internal or external URLs during the actual fetch.