Unspecified vulnerability in phpBB before 2.0.22 has unknown impact and remote attack vectors related to "criteria for 'bad' redirection targets."

Certain forms in phpBB before 2.0.22 lack session checks, which has unknown impact and remote attack vectors.

Unspecified vulnerability in phpBB before 2.0.22 has unknown impact and remote attack vectors related to a "negative start parameter."

Cross-site request forgery (CSRF) vulnerability in phpBB 2.0.21 allows remote authenticated users to send unauthorized messages as an arbitrary user via unspecified vectors. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Cross-site scripting (XSS) vulnerability in the private message box implementation (privmsg.php) in phpBB 2.0.x allows remote authenticated users to inject arbitrary web script or HTML via the "Message body" field in a message to a non-existent user.

PHP remote file inclusion vulnerability in player/includes/common.php in Teake Nutma Foing, as modified in Fully Modded phpBB (phpbbfm) 2021.4.40, allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter.

PHP remote file inclusion vulnerability in admin/admin_topic_action_logging.php in Admin Topic Action Logging Mod 0.95 and earlier, as used in phpBB 2.0 up to 2.0.21, allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter.

PHP remote file inclusion vulnerability in includes/functions_kb.php in the phpBB XS 2 (Spain version) allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter, a different vector than CVE-2006-4780 or CVE-2006-4893.

phpBB 2.0.21 does not properly handle pathnames ending in %00, which allows remote authenticated administrative users to upload arbitrary files, as demonstrated by a query to admin/admin_board.php with an avatar_path parameter ending in .php%00.

usercp_avatar.php in PHPBB 2.0.20, when avatar uploading is enabled, allows remote attackers to use the server as a web proxy by submitting a URL to the avatarurl parameter, which is then used in an HTTP GET request.