PunBB 1.2.9, when used alone or with F-ART BLOG:CMS, includes config.php before calling the unregister_globals function, which allows attackers to obtain unspecified sensitive information.
PunBB 1.2.9, used alone or with F-ART BLOG:CMS, may trust a client's IP address as specified in the X-Forwarded-For HTTP header rather than the TCP/IP stack, which allows remote attackers to misrepresent their IP address by sending a modified header.
PunBB 1.2.10 and earlier allows remote attackers to conduct brute force guessing attacks for an account's password, which may be as short as 4 characters.