PHP remote file inclusion vulnerability in viewtopic.php in phpBB 2.0.15 and earlier allows remote attackers to execute arbitrary PHP code.

The bbencode_second_pass and make_clickable functions in bbcode.php for phpBB before 2.0.15, as used in viewtopic.php, privmsg.php, and other scripts, allow remote attackers to execute arbitrary script via a BBcode tag with a (1) javascript:, (2) applet:, (3) about:, (4) activex:, (5) chrome:, or (6) script: URI scheme, as demonstrated using the URL tag.

Multiple cross-site scripting (XSS) vulnerabilities in phpBB 2.0.14 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) u parameter to profile.php, (2) highlight parameter to viewtopic.php, or (3) forumname or forumdesc parameters to admin_forums.php.

calendar_scheduler.php in Topic Calendar 1.0.1 module for phpBB, when running on a Microsoft IIS server, allows remote attackers to obtain sensitive information via invalid parameters, which reveal the path in an error message.

sessions.php in phpBB 2.0.12 and earlier allows remote attackers to gain administrator privileges via the autologinid value in a cookie.

Multiple SQL injection vulnerabilities in phpbb-Auction allow remote attackers to execute arbitrary SQL commands via the (1) u parameter to auction_rating.php or (2) ar parameter to action_offer.php.

auction_my_auctions.php in phpbb-Auction 1.2m and earlier allows remote attackers to obtain sensitive information via an invalid mode parameter, which leaks the full path in a PHP error message.

phpBB 2.0.13 and earlier allows remote attackers to obtain sensitive information via a direct request to oracle.php, which reveals the path in a PHP error message.

Cross-site scripting (XSS) vulnerability in usercp_register.php for phpBB 2.0.13 allows remote attackers to inject arbitrary web script or HTML by setting the (1) allowhtml, (2) allowbbcode, or (3) allowsmilies parameters to inject HTML into signatures for personal messages, possibly when they are processed by privmsg.php or viewtopic.php.

Multiple cross-site scripting (XSS) vulnerabilities in PhpBB Plus 1.52 and earlier allow remote attackers to inject arbitrary web script or HTML via the bsid parameter to (1) groupcp.php, (2) index.php, (3) portal.php, (4) viewforum.php, or (5) viewtopic.php, (6) the c parameter to index.php, or (7) the article parameter to portal.php.