PaperCut NG upload Link Following Information Disclosure Vulnerability

This vulnerability allows remote attackers to disclose sensitive information on affected installations of PaperCut NG. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the upload endpoint. By uploading a symbolic link, an attacker can abuse the service to read arbitrary files. An attacker can leverage this vulnerability to disclose information in the context of root.