DISPUTED PHP remote file inclusion vulnerability in common.php in PHORUM 5.1.13 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the PHORUM[httppath] parameter. NOTE: this issue has been disputed by the vendor, who states "common.php is checked on the very first line of non-comment code that it is not being called directly. It has been this way in all 5.x version of Phorum." CVE analysis concurs with the vendor.

Cross-site scripting (XSS) vulnerability in Phorum before 3.4.3 allows remote attackers to inject arbitrary web script and HTML tags via a message with a "<<" before a tag name in the (1) subject, (2) author's name, or (3) author's e-mail.

Directory traversal vulnerability in pm.php in Phorum 5 allows remote authenticated users to include and execute arbitrary local files via directory traversal sequences in the GLOBALS[template] parameter, as demonstrated by injecting PHP sequences into a log file, which is then included by pm.php.

Multiple cross-site scripting (XSS) vulnerabilities in Phorum 5.0.17a and earlier allow remote attackers to inject arbitrary web script or HTML via (1) the username parameter to register.php or (2) a signature of a logged-in user in "My Control Center," which is not properly handled by control.php.

Multiple cross-site scripting (XSS) vulnerabilities in Phorum 3.1 through 5.0.3 beta allow remote attackers to inject arbitrary web script or HTML via the (1) HTTPREFERER parameter to login.php, (2) HTTPREFERER parameter to register.php, or (3) target parameter to profile.php.

Cross-site scripting (XSS) vulnerability in Phorum before 5.2.15 allows remote attackers to inject arbitrary web script or HTML via an invalid email address.

Cross-site scripting (XSS) vulnerability in Phorum before 5.2.10 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.