[原文]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 Event Calendar contains a flaw that allows a remote cross site scripting attack. This flaw exists because the application does not validate the 'username' and 'password' variables upon submission to the 'users.php' script. This could allow a user to create a specially crafted URL that would execute arbitrary code in a user's browser within the trust relationship between the browser and the server, leading to a loss of integrity.
Currently, there are no known upgrades, patches, or workarounds available to correct this issue.