viewtopic.php in phpBB 2.x before 2.0.11 improperly URL decodes the highlight parameter when extracting words and phrases to highlight, which allows remote attackers to execute arbitrary PHP code by double-encoding the highlight value so that special characters are inserted into the result, which is then processed by PHP exec, as exploited by the Santy.A worm.
Cross-site scripting (XSS) vulnerability in search.php for PhpBB 2.0.4 and 2.0.9 allows remote attackers to inject arbitrary HTMl or web script via the search_author parameter.
PHP remote file inclusion vulnerability in album_portal.php in phpBB modified by Przemo 1.8 allows remote attackers to execute arbitrary PHP code via the phpbb_root_path parameter.
SQL injection vulnerability in page_header.php in phpBB 2.0, 2.0.1 and 2.0.2 allows remote attackers to brute force user passwords and possibly gain unauthorized access to forums via the forum_id parameter to index.php.
SQL injection vulnerability in groupcp.php for phpBB 2.0.6 and earlier allows group moderators to perform unauthorized activities via the sql_in parameter.
SQL injection vulnerability in search.php for phpBB 2.0.6 and earlier allows remote attackers to execute arbitrary SQL and gain privileges via the search_id parameter.
install.php in phpBB 2.0 through 2.0.1, when "allow_url_fopen" and "register_globals" variables are set to "on", allows remote attackers to execute arbitrary PHP code by modifying the phpbb_root_dir parameter to reference a URL on a remote web server that contains the code.
SQL injection vulnerability in Gender MOD 1.1.3 allows remote attackers to gain administrative access via the user_level parameter in the User Profile page.