Multiple cross-site request forgery (CSRF) vulnerabilities in Horde before 5.2.8, Horde Groupware before 5.2.11, and Horde Groupware Webmail Edition before 5.2.11 allow remote attackers to hijack the authentication of administrators for requests that execute arbitrary (1) commands via the cmd parameter to admin/cmdshell.php, (2) SQL queries via the sql parameter to admin/sqlshell.php, or (3) PHP code via the php parameter to admin/phpshell.php.

The framework/Util/lib/Horde/Variables.php script in the Util library in Horde before 5.1.1 allows remote attackers to conduct object injection attacks and execute arbitrary PHP code via a crafted serialized object in the _formvars form.

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).

Cross-site scripting (XSS) vulnerability in framework/NLS/NLS.php in Horde Framework before 3.1.4 RC1, when the login page contains a language selection box, allows remote attackers to inject arbitrary web script or HTML via the new_lang parameter to login.php.

Argument injection vulnerability in the cleanup cron script in Horde Project Horde and IMP before Horde Application Framework 3.1.4 allows local users to delete arbitrary files and possibly gain privileges via multiple space-delimited pathnames.

services/go.php in Horde Application Framework 3.0.0 through 3.0.10 and 3.1.0 through 3.1.1 does not properly restrict its image proxy capability, which allows remote attackers to perform "Web tunneling" attacks and use the server as a proxy via (1) http, (2) https, and (3) ftp URL in the url parameter, which is requested from the server.

Multiple cross-site scripting (XSS) vulnerabilities in Horde Application Framework before 3.0.8 allow remote authenticated users to inject arbitrary web script or HTML via multiple vectors, as demonstrated by (1) the identity field, (2) Category and (3) Label search fields, (4) the Mobile Phone field, and (5) Date and (6) Time fields when importing CSV files, as exploited through modules such as (a) Turba Address Book, (b) Kronolith, (c) Mnemo, and (d) Nag.