auth_login.php in Cacti before 0.8.8g allows remote authenticated users who use web authentication to bypass intended access restrictions by logging in as a user not in the cacti database.
bugs.cacti.net/view.php?id=2656
lists.opensuse.org/opensuse-updates/2016-02/msg00077.html
lists.opensuse.org/opensuse-updates/2016-02/msg00078.html
lists.opensuse.org/opensuse-updates/2016-02/msg00080.html
www.cacti.net/release_notes_0_8_8g.php
www.securitytracker.com/id/1037745
security.gentoo.org/glsa/201607-05
security.gentoo.org/glsa/201711-10