Multiple cross-site scripting (XSS) vulnerabilities in WWWthreads 5.4.2 and earlier allow remote attackers to inject arbitrary web script or HTML via the Cat parameter to (1) dosearch.php, (2) postlist.php, (3) showmembers.php, (4) faq_english.php, (5) online.php, (6) login.php, (7) newuser.php, (8) wwwthreads.php, (9) search.php, or (10) postlist.php.

wwwthreads does not properly cleanse numeric data or table names that are passed to SQL queries, which allows remote attackers to gain privileges for wwwthreads forums.

Infopop UBB.Threads 5.4 and Wired Community Software WWWThreads 5.0 through 5.0.9 allows remote attackers to upload arbitrary files by using a filename that contains an accepted extension, but ends in a different extension.

Multiple SQL injection vulnerabilities in WWWThreads RC 3 allow remote attackers to execute arbitrary SQL commands via (1) the forumreferrer cookie to register.php and (2) the messages parameter in message_list.php.

Cross-site scripting (XSS) vulnerability in calendar.php in WWWthreads allows remote attackers to inject arbitrary web script or HTML via the week parameter.