Winn ASP Guestbook 1.01 Beta stores sensitive information under the web root with insufficient access control, which allows remote attackers to download a database via a direct request for data/guestbook.mdb.
Cross-site scripting (XSS) vulnerability in the addPost function in data/functions.php in Winn GuestBook before 2.4.8d allows remote attackers to inject arbitrary web script or HTML via the name parameter to index.php.
Cross-site scripting (XSS) vulnerability in index.php in Winn Guestbook 2.4 allows remote attackers to inject arbitrary web script or HTML via the PATH_INFO.