I found a vulnerability en phpbb 2.0.5 and prior, is probably also affect 2.0.6I think it doesn't affect on php servers where the magic_quotes are on. Because magic_quotes replace ' in \'. And " in \". So it is unsecure when you user phpbb 2.0.5 on a server with magic_quotes off.
this bug don't affect to version 2.0.7
phpbb have a list of registereds users, when you click on a memebr of this list, you are requesting data to the database
for example:
http://www.example.com/forum/profile.php?mode=viewprofile&u=2
this url show the information to the user with the uid = 2, the uid is a number assigned to users in phpbb.
but it isn't secure, because if you use this url, you can inject sql comands...
exploit:
http://www.example.com/profile.php?mode=viewprofile&u='[sqlcode]
where [sql code] represents the code may be injected.
Regards,
Jort