Horde IMP 4.3.6 and earlier does not request that the web browser avoid DNS prefetching of domain names contained in e-mail messages, which makes it easier for remote attackers to determine the network location of the webmail user by logging DNS requests.

Common Vulnerabilities and Exposures assigned an identifier CVE-2007-6018 to the following vulnerability:

IMP Webmail Client 4.1.5, Horde Application Framework 3.1.5, and Horde Groupware Webmail Edition 1.0.3 does not validate unspecified HTTP requests, which allows remote attackers to (1) delete arbitrary e-mail messages via a modified numeric ID or (2) "purge" deleted emails via a crafted email message.

References:

http://secunia.com/secuniaresearch/2007-102/advisory/ http://www.securityfocus.com/bid/27223 http://secunia.com/advisories/28020

Cross-site scripting (XSS) vulnerability in fetchmailprefs.php in Horde IMP before 4.3.8, and Horde Groupware Webmail Edition before 1.2.7, allows remote attackers to inject arbitrary web script or HTML via the fmid parameter in a fetchmailprefssave action, related to the Fetchmail configuration.