CVE-2018-1058

A flaw was found in the way Postgresql allowed a user to modify the behavior of a query for other users. An attacker with a user account could use this flaw to execute code with the permissions of superuser in the database.

Mitigation

Upstream suggests the following mitigation can be used to protect against this security flaw:
<https://wiki.postgresql.org/wiki/A_Guide_to_CVE-2018-1058:_Protect_Your_Search_Path&gt;