The remote host may give an attacker information useful for future attacks.
The remote host is running a version of PHP that is older than 4.4.0 or 5.0.6. This version has a flaw where remote attackers can reenable the 'register_globals' parameter. In addition, a remote attacker may be able to overwrite the 'GLOBAL' variable. This may lead to another more serious exploitation.
Upgrade to version 5.0.6 or higher.