Upload exploit method-vulnerability warning-the black bar safety net

Directly upload asp. asa. jsp. cer. php. aspx. htr. cdx.... Like the horse, get to the shell. 2. Is in upload when the suffix followed by a space or plus points, and perhaps will have a surprise discovery. Example:. asp ,. asp..。 3. The use of a dual extension is uploaded, for example:. jpg. asa...