Multiple cross-site scripting (XSS) vulnerabilities in eyeOS before 0.9.1 allow remote attackers to inject arbitrary web script or HTML via unspecified vectors involving (1) eyeNav and (2) system/baixar.php.

eyeOS uses predictable checksum values in the checknum parameter for access control, which allows remote attackers to register many accounts via doCreateUser actions, add many eyeBoard messages via addMsg actions, and cause a denial of service or conduct certain unauthorized activities, by guessing valid parameter values.

Cross-site scripting (XSS) vulnerability in desktop.php in eyeOS 0.8.4 allows remote attackers to inject arbitrary web script or HTML via the motd parameter.

eyeOS 0.8.4 stores usrinfo.xml under the web document root with insufficient access control, which allows remote attackers to obtain user credentials.

desktop.php in eyeOS 0.8.9 and earlier tests for the existence of the _SESSION variable before calling the session_start function, which allows remote attackers to execute arbitrary PHP code and possibly conduct other attacks by modifying critical assumed-immutable variables, as demonstrated using PHP code in the _SESSION[apps][eyeOptions.eyeapp][wrapup] variable.