Unspecified vulnerability in Oracle MySQL 5.1.66 and earlier and 5.5.28 and earlier allows remote authenticated users to affect confidentiality, integrity, and availability via unknown vectors related to Server Privileges.
http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html
http://security.gentoo.org/glsa/glsa-201308-06.xml