OpenTeknik LLC OSSN OPEN SOURCE SOCIAL NETWORK v6.3 LTS was discovered to contain an arbitrary file upload vulnerability via the component /ossn/administrator/com_installer. This vulnerability allows attackers to execute arbitrary code via a crafted PHP file.
https://www.openteknik.com/contact?channel=ossn
https://www.opensource-socialnetwork.org/
https://github.com/opensource-socialnetwork/opensource-socialnetwork/releases/tag/6.3