Horde before 2.2.4 allows remote malicious web sites to steal session IDs and read or create arbitrary email by stealing the ID from a referrer URL.
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.
Unspecified cross-site scripting (XSS) vulnerability in Horde before 2.2.9 allows remote attackers to inject arbitrary web script or HTML via "not properly escaped error messages".