Zeroboard 4.1, when the "allow_url_fopen" and "register_globals" variables are enabled, allows remote attackers to execute arbitrary PHP code by modifying the _zb_path parameter to reference a URL on a remote web server that contains the code.

PHP remote file inclusion vulnerability in ZeroBoard 4.1pl4 and earlier allows remote attackers to execute arbitrary PHP code by modifying the (1) _zb_path parameter to outlogin.php or (2) dir parameter to write.php to reference a URL on a remote web server that contains the code.

Cross-site scripting (XSS) vulnerability in check_user_id.php in ZeroBoard 4.1pl4 and earlier allows remote attackers to inject arbitrary web script or HTML via the user_id parameter.

Multiple directory traversal vulnerabilities in ZeroBoard 4.1pl5 and earlier allow remote attackers to read arbitrary files via a .. (dot dot) in the _zb_path parameter to (1) _head.php or (2) outlogin.php, or the dir parameter to (3) write.php.

Multiple PHP remote file inclusion vulnerabilities in (1) print_category.php, (2) login.php, (3) setup.php, (4) ask_password.php, or (5) error.php in ZeroBoard 4.1pl5 and earlier allow remote attackers to execute arbitrary PHP code by modifying the dir parameter to reference a URL on a remote web server that contains the code.

Cross-site scripting (XSS) vulnerability in ZeroBoard allows remote attackers to inject arbitrary web script or HTML via the (1) sn1, (2) year, or (3) page parameter to zboard.php or (4) filename to view_image.php.

zboard.php in Zeroboard version 4.1pl2 to 4.1pl5 allows remote attackers to execute arbitrary PHP code via improper quoting when using the preg_replace function.

Multiple cross-site scripting (XSS) vulnerabilities in zeroboard 4.1 pl7 allows allow remote attackers to inject arbitrary web script or HTML via the (1) memo box title, (2) user email, and (3) homepage fields.

write_ok.php in Zeroboard 4.1 pl8, when installed on Apache with mod_mime, allows remote attackers to bypass restrictions for uploading files with executable extensions by uploading a .htaccess file that with an AddType directive that assigns an executable module to files with assumed-safe extensions, as demonstrated by assigning the txt extension to be handled by application/x-httpd-php.