SQL injection vulnerability in Quassel IRC before 0.9.1, when Qt 4.8.5 or later and PostgreSQL 8.2 or later are used, allows remote attackers to execute arbitrary SQL commands via a \ (backslash) in a message.
https://exchange.xforce.ibmcloud.com/vulnerabilities/87805
http://www.securityfocus.com/bid/62923
http://security.gentoo.org/glsa/glsa-201311-03.xml
http://secunia.com/advisories/55581
http://secunia.com/advisories/55194
http://seclists.org/oss-sec/2013/q4/74