MariaDB have noted in their release notes that reserved CVE-2017-15365 has been fixed in version 10.2.10[1], however they have not described how or what the vulnerability was. This CVE is also mentioned to affect Percona[2] with the fix is described as:

"Added access checks for DDL commands to make sure they do not get replicated if they failed without proper permissions"

A comparison with the MariaDB 10.2.10 changelog[3] and Percona description finds this commit[4], which seems a likely candidate for both describing and fixing the vulnerability. The vulnerable code block in sql/eventdataobjects.cc is also present in version 10.1, suggesting that it is also affected.

[0] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15365 [1] https://mariadb.com/kb/en/library/mariadb-10210-release-notes/ [2] https://www.percona.com/doc/percona-xtradb-cluster/LATEST/release-notes/Percona-XtraDB-Cluster-5.7.19-29.22-3.html [3] https://mariadb.com/kb/en/library/mariadb-10210-changelog/ [4] https://github.com/MariaDB/server/commit/0b5a5258abbeaf8a0c3a18c7e753699787fdf46e