Horde 3.3.12, Horde Groupware 1.2.10, and Horde Groupware Webmail Edition 1.2.10, as distributed by FTP between November 2011 and February 2012, contains an externally introduced modification (Trojan Horse) in templates/javascript/open_calendar.js, which allows remote attackers to execute arbitrary PHP code.

Cross-site request forgery (CSRF) vulnerability in the Horde Application Framework before 3.3.9 allows remote attackers to hijack the authentication of unspecified victims for requests to a preference form.

Cross-site scripting (XSS) vulnerability in util/icon_browser.php in the Horde Application Framework before 3.3.9 allows remote attackers to inject arbitrary web script or HTML via the subdir parameter.

Multiple cross-site scripting (XSS) vulnerabilities in Horde Application Framework 3.2 before 3.2.5 and 3.3 before 3.3.5; Groupware 1.1 before 1.1.6 and 1.2 before 1.2.4; and Groupware Webmail Edition 1.1 before 1.1.6 and 1.2 before 1.2.4; allow remote attackers to inject arbitrary web script or HTML via the (1) crafted number preferences that are not properly handled in the preference system (services/prefs.php), as demonstrated by the sidebar_width parameter; or (2) crafted unknown MIME "text parts" that are not properly handled in the MIME viewer library (config/mime_drivers.php).

Directory traversal vulnerability in framework/Image/Image.php in Horde before 3.2.4 and 3.3.3 and Horde Groupware before 1.1.5 allows remote attackers to include and execute arbitrary local files via directory traversal sequences in the Horde_Image driver name.

Cross-site scripting (XSS) vulnerability in the tag cloud search script (horde/services/portal/cloud_search.php) in Horde before 3.2.4 and 3.3.3, and Horde Groupware before 1.1.5, allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.