The Horde_Ldap library before 2.0.6 for Horde allows remote attackers to bypass authentication by leveraging knowledge of the LDAP bind user DN.
https://marc.info/?l=horde-announce&m=140178644816474&w=2
https://github.com/horde/horde/commit/4c3e18f1724ab39bfef10c189a5b52036a744d55
https://bugzilla.redhat.com/show_bug.cgi?id=1109628