Bogdan Calin has discovered a vulnerability in zenphoto, which can be exploited by malicious people to conduct cross-site scripting attacks.
Input passed via the "user" parameter to zp-core/admin.php is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
The vulnerability is confirmed in version 1.3. Other versions may also be affected.