How about this one, do dev know it?
http://www.milw0rm.com/exploits/7909
Thanks for letting us know - that's a brand-new one. We'll look into this and come up with a resolution as soon as possible.
I can confirm this exploit. Working for a fix.
The patch given by the reporter unsets all variables which were registered because of register_globals on. I think this is the correct way.
cpg1.4.20 has just been released, which takes care of the exploit. See corresponding announcement thread cpg1.4.20 Security release - upgrade mandatory! (http://forum.coppermine-gallery.net/index.php/topic,57882.0.html)