GFI MailEssentials AI Stored Cross-Site Scripting Vulnerability in URI DNS Blocklist Configuration

A stored cross-site scripting vulnerability has been identified in GFI MailEssentials AI versions prior to 22.4. The issue resides in the URI DNS Blocklist configuration page, where an authenticated user can inject HTML or JavaScript into the 'ctl00$ContentPlaceHolder1$pv1$TXB_URIs' parameter. This injected script is stored and later executed in the management interface, affecting the logged-in user.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user.