Cross-site scripting (XSS) vulnerability in Softcomplex PHP Event Calendar 1.5 allows remote authenticated users to inject arbitrary web script or HTML, and corrupt data, via the (1) username and (2) password parameters, which are not sanitized before being written to users.php. NOTE: while this issue was originally reported as XSS, the primary issue might be direct static code injection with resultant XSS.

PHP remote file inclusion vulnerability in calendar.php in SoftComplex PHP Event Calendar 1.4 allows remote attackers to execute arbitrary PHP code via a URL in the path_to_calendar parameter, which overwrites the $path_to_calendar variable from an extract function call.