CVE 2012-1468

Incomplete blacklist vulnerability in Open Journal Systems before 2.3.7 allows remote authenticated users with the Author Role permission to execute arbitrary code by uploading a file with an executable extension that is not ".php", then accessing it via a direct request to the file in submission/original/ in the associated article directory, as demonstrated using .pHp, .asp, and other extensions.

See the CVE page on Mitre.org for more details.