Cross-site scripting (XSS) vulnerability in index.php for Quick.Forum 2.1.6 allows remote attackers to inject arbitrary web script or HTML via the topic field in a NewTopic action.

Multiple SQL injection vulnerabilities in Quick.Forum 2.1.6 allow remote attackers to execute arbitrary SQL commands via the (1) iCategory or (2) page parameter to index.php, or (3) iCategory parameter in the query string to the forum directory.

Quick.Forum 2.1.6 stores potentially sensitive information such as usernames, banned IP addresses, censored words, and backups under the web document root, which allows remote attackers to obtain that information via a direct request to (1) db/users.txt, (2) db/banList.txt, (3) db/censureWords.txt, or (4) backup files.