Ultimate Product Catalog < 5.2.6 - Admin+ Stored XSS

The plugin does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

PoC

1. Navigate to the plugin setup page. 2. Go to the “Categories” section. 3. In the “Category Name” field, input the payload: `

<p title="</noscript>` 6. The payload will be executed, demonstrating the vulnerability.