PunBB uses a predictable cookie_seed value that can be derived from the time of registration of the superadmin account (installation time), which might allow local users to perform unauthorized actions.

SQL injection vulnerability in search.php in PunBB before 1.2.14, when the PHP installation is vulnerable to CVE-2006-3017, allows remote attackers to execute arbitrary SQL commands via the result_list array parameter, which is not initialized.

PunBB 1.2.12 does not properly handle an avatar directory pathname ending in %00, which allows remote authenticated administrative users to upload arbitrary files and execute code, as demonstrated by a query to admin_options.php with an avatars_dir parameter ending in %00. NOTE: this issue was originally disputed by the vendor, but the dispute was withdrawn on 20060926.

Cross-site scripting (XSS) vulnerability in PunBB 1.2.11 allows remote authenticated administrators to inject arbitrary HTML or web script to other administrators via the "Admin note" feature, a different vulnerability than CVE-2006-2227.

Cross-site scripting (XSS) vulnerability in misc.php in PunBB 1.2.11 allows remote attackers to inject arbitrary web script or HTML via the req_message parameter, because the value of the redirect_url parameter is not sanitized.

register.php in PunBB 1.2.10 allows remote attackers to cause an unspecified denial of service via a flood of new user registrations.

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.