X-News (x_news) 1.1 and earlier allows attackers to authenticate as other users by obtaining the MD5 checksum of the password, e.g. via sniffing or the users.txt data file, and providing it in a cookie.

Cross-site scripting (XSS) vulnerability in x_stat_admin.php in x-stat 2.3 and earlier allows remote attackers to inject arbitrary web script or HTML via a parameter to the phpinfo action.

x_stat_admin.php in x-stat 2.3 and earlier allows remote attackers to (1) execute PHP commands such as phpinfo or (2) obtain the full path of the web server via an invalid action parameter, which leaks the pathname in an error message.

x_news.php in X-News (x_news) 1.1 and earlier allows remote attackers to gain administrative privileges by stealing and replaying the md5_password cookie.