phpBB 2.0.17 and earlier allows remote attackers to bypass protection mechanisms that deregister global variables by setting both a GET/POST/COOKIE (GPC) variable and a GLOBALS[] variable with the same name, which causes phpBB to unset the GLOBALS[] variable but not the GPC variable.
- http://marc.info/?l=bugtraq&m=113081113317600&w=2
- http://securityreason.com/securityalert/130
No PoCs found on GitHub currently.