Unknown vulnerability in Horde IMP 3.2.3 and earlier, before a "security fix," does not properly validate input, which allows remote attackers to execute arbitrary script as other users via script or HTML in an e-mail message, possibly triggering a cross-site scripting (XSS) vulnerability.

Horde IMP 2.2.4 and earlier allows local users to overwrite files via a symlink attack on a temporary file.

Cross-site scripting vulnerability in Horde Internet Messaging Program (IMP) before 2.2.6 and 1.2.6 allows remote attackers to execute arbitrary Javascript embedded in an email.

Horde Internet Messaging Program (IMP) before 2.2.6 allows local users to read IMP configuration files and steal the Horde database password by placing the prefs.lang file containing PHP code on the server.

IMP 2.2 and earlier allows attackers to read and delete arbitrary files by modifying the attachment_name hidden form variable, which causes IMP to send the file to the attacker as an attachment.

IMP does not remove files properly if the MSWordView application quits, which allows local users to cause a denial of service by filling up the disk space by requesting a large number of documents and prematurely stopping the request.

The MSWordView application in IMP creates world-readable files in the /tmp directory, which allows other local users to read potentially sensitive information.