Cross-site scripting (XSS) vulnerability in header.php in PunBB 1.2.10 allows remote attackers to inject arbitrary web script or HTML via the URL, which is not properly handled when the PHP_SELF variable is used to handle a pun_page tag.

PunBB 1.2.10 and earlier allows remote attackers to cause a denial of service (resource consumption) by registering many user accounts quickly.

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.

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 1.2.9, 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.

SQL injection vulnerability in search.php in PunBB 1.2.7 and 1.2.8 allows remote attackers to execute arbitrary SQL commands via the old_searches parameter.