Prometheus 6.0 and earlier allows remote attackers to execute arbitrary PHP code via a modified PROMETHEUS_LIBRARY_BASE that points to code stored on a remote server, which is then used in (1) index.php, (2) install.php, or (3) various test_*.php scripts.
http://www.securityfocus.com/bid/6087
http://www.iss.net/security_center/static/10515.php
http://marc.info/?l=bugtraq&m=103616306403031&w=2
http://archives.neohapsis.com/archives/vulnwatch/2002-q4/0050.html