An issue was discovered in MinDoc through v1.0.2

An issue was discovered in MinDoc through v1.0.2. It allows attackers to gain privileges by uploading an image file with contents that represent an admin session, and then sending a Cookie: header with a mindoc_id value containing the relative pathname of this uploaded file. For example, the mindoc_id (aka session ID) could be of the form aa/../../uploads/blog/201811/attach_#.jpg where '#' is a hex value displayed in the upload field of a manage/blogs/edit/ screen.