2. "You have to update 7zip to open this archive, you don't need to open any executables, just drag 7zipv0.99.7z to help window"
3. ????
4. Profit
edit: I personally think the author did a great job finding & publishing it.
Not really.
They seem to be implying they got to running a command as SYSTEM from 7-zip, but, like, don't specify things like what security context 7-zip started as, or how a program running as non-admin got to a system security context, or like, how that's 7zip's fault and not the fault of the OS.
This is all very confusing.
Even if all they did was took that screen shot from process explorer and expanded it to include the user column, it would be like 99% more clear what the fuck is going on.
"Due to community security, it will not be published until the update is passed. Maybe it will never be published :)"
would hardly call this publishing