Multiple cross-site scripting (XSS) vulnerabilities in Horde before 3.0.7 allow remote attackers to inject arbitrary web script or HTML via the (1) gzip/tar and (2) css MIME viewers, which do not filter or escape dangerous HTML when extracting and displaying attachments.
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.