phpMyFAQ FileName parameter cross-site scripting vulnerability

phpMyFAQ is a multi-language, fully database-driven FAQ system. A cross-site scripting vulnerability exists in versions prior to phpMyFAQ 3.2.2, which stems from the lack of effective filtering and escaping of user-supplied data in the FileName parameter of the file attachment upload function, and can be exploited by an attacker to execute arbitrary web script or HTML by injecting a carefully crafted payload.