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.

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.

Cross-site scripting (XSS) vulnerability in horde/imp/search.php in Horde IMP H3 before 4.1.3 allows remote attackers to include arbitrary web script or HTML via multiple unspecified vectors related to folder names, as injected into the vfolder_label form field in the IMP search screen.

Multiple cross-site scripting (XSS) vulnerabilities in Horde Application Framework 3.0.0 through 3.0.10 and 3.1.0 through 3.1.1 allow remote attackers to inject arbitrary web script or HTML via a (1) javascript URI or an external (2) http, (3) https, or (4) ftp URI in the url parameter in services/go.php (aka the dereferrer), (5) a javascript URI in the module parameter in services/help (aka the help viewer), and (6) the name parameter in services/problem.php (aka the problem reporting screen).

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.

Horde Application Framework 3.0.9 allows remote attackers to read arbitrary files via a null character in the url parameter in services/go.php, which bypasses a sanity check.