Quassel core (server daemon) in Quassel IRC before 0.9.2 does not properly verify the user ID when accessing user backlogs, which allows remote authenticated users to read other users’ backlogs via the bufferid in (1) 16/select_buffer_by_id.sql, (2) 16/select_buffer_by_id.sql, and (3) 16/select_buffer_by_id.sql in core/SQL/PostgreSQL/.
lists.opensuse.org/opensuse-updates/2013-12/msg00092.html
lists.opensuse.org/opensuse-updates/2014-01/msg00078.html
osvdb.org/100432
quassel-irc.org/node/123
secunia.com/advisories/55640
www.openwall.com/lists/oss-security/2013/11/28/8
exchange.xforce.ibmcloud.com/vulnerabilities/89377
github.com/quassel/quassel/commit/a1a24da