MEDIUM
Jython 2.2.1 uses the current umask to set the privileges of the class cache files, which allows local users to bypass intended access restrictions via unspecified vectors.
http://advisories.mageia.org/MGASA-2015-0096.html
http://lists.opensuse.org/opensuse-updates/2015-02/msg00055.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:158
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html