Multiple PHP remote file inclusion vulnerabilities in MaxCMS 3.11.20b, when register_globals is enabled, allow remote attackers to execute arbitrary PHP code via a URL in the (1) is_projectPath parameter to includes/InstantSite/inc.is_root.php; GLOBALS[thCMS_root] parameter to (2) classes/class.Tree.php, (3) includes/inc.thcms_admin_mediamanager.php, and (4) modul/mod.rssreader.php; is_path parameter to (5) class.tasklist.php, (6) class.thcms.php, (7) class.thcms_content.php, (8) class.thcms_modul_parent.php, (9) class.thcms_page.php, and (10) class.thcsm_user.php in classes/; and (11) includes/InstantSite/class.Tree.php; and thCMS_root parameter to (12) classes/class.thcms_modul.php; (13) inc.page_edit_tasklist.php, (14) inc.thcms_admin_overview_backup.php, and (15) inc.thcms_edit_content.php in includes/; and (16) class.thcms_modul_parent_xml.php, (17) mod.cmstranslator.php, (18) mod.download.php, (19) mod.faq.php, (20) mod.guestbook.php, (21) mod.html.php, (22) mod.menu.php, (23) mod.news.php, (24) mod.newsticker.php, (25) mod.rss.php, (26) mod.search.php, (27) mod.sendtofriend.php, (28) mod.sitemap.php, (29) mod.tagdoc.php, (30) mod.template.php, (31) mod.test.php, (32) mod.text.php, (33) mod.upload.php, and (34) mod.users.php in modul/.