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.
Meilad File upload script (up.php) mod for phpBB 2.0.x does not properly limit the types of files that can be uploaded, which allows remote authenticated users to execute arbitrary commands by uploading PHP files, then directly requesting them from the uploads directory.
Directory traversal vulnerability in (1) usercp_register.php and (2) usercp_avatar.php for phpBB 2.0.11, and possibly other versions, with gallery avatars enabled, allows remote attackers to delete (unlink) arbitrary files via "/../" sequences in the avatarselect parameter.
phpBB 2.0.11, and possibly other versions, with remote avatars and avatar uploading enabled, allows local users to read arbitrary files by providing both a local and remote location for an avatar, then modifying the "Upload Avatar from a URL:" field to reference the target file.
viewtopic.php in phpBB 2.0.12 and earlier allows remote attackers to obtain sensitive information via a highlight parameter containing invalid regular expression syntax, which reveals the path in a PHP error message.
CRLF injection vulnerability in PhpBB 2.0.4 and 2.0.9 allows remote attackers to perform HTTP Response Splitting attacks to modify expected HTML content from the server via (1) the mode parameter to privmsg.php or (2) the redirect parameter to login.php.
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.
PhpBB 2.0.8 allows remote attackers to gain sensitive information via an invalid (1) category_rows parameter to index.php, (2) faq parameter to faq.php, or (3) ranksrow parameter to profile.php, which reveal the full path in an error message.
Multiple cross-site scripting (XSS) vulnerabilities in PhpBB 2.0.8 allow remote attackers to inject arbitrary web script or HTML via (1) the cat_title parameter in index.php, (2) the faq[0][0] parameter in lang_faq.php as accessible from faq.php, or (3) the faq[0][0] parameter in lang_bbcode.php as accessible from faq.php.
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.