Versions 3.2.0 and earlier of the pidgin-otr plugin contain a security flaw.
This flaw could potentially be exploited by a remote attacker to cause arbitrary code to be executed on the user's machine.
The flaw is in pidgin-otr, not in libotr.
Other applications which use libotr are not affected.
The recommended course of action is to upgrade pidgin-otr to version 3.2.1 immediately.
The new version can be obtained here: