Gitea version 1.24.0 is susceptible to HTML Injection and potentially Reflected Cross-Site Scripting (XSS) through the 'description' parameter on the user settings page. The lack of proper sanitization of user-supplied HTML content allows malicious scripts to be executed in the user's browser, leading to potential attacks. An attacker can inject malicious HTML or JavaScript code into their profile description, which gets executed when saved, demonstrating the presence of the vulnerability.