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.
https://www.redhat.com/archives/fedora-package-announce/2008-February/msg00927.html
https://www.redhat.com/archives/fedora-package-announce/2008-February/msg00888.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/39595
https://bugzilla.redhat.com/show_bug.cgi?id=428625
http://www.securityfocus.com/bid/27223
http://www.debian.org/security/2008/dsa-1470
http://secunia.com/secunia_research/2007-102/advisory/
http://secunia.com/advisories/34418
http://secunia.com/advisories/29186
http://secunia.com/advisories/29185
http://secunia.com/advisories/29184
http://secunia.com/advisories/28546
http://secunia.com/advisories/28020
http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00004.html
http://lists.horde.org/archives/announce/2008/000366.html
http://lists.horde.org/archives/announce/2008/000365.html
http://lists.horde.org/archives/announce/2008/000360.html
http://cvs.horde.org/diff.php/groupware/docs/webmail/CHANGES?r1=1.12&r2=1.12.2.1&ty=h
http://cvs.horde.org/diff.php/groupware/docs/groupware/CHANGES?r1=1.17&r2=1.17.2.1&ty=h