Days of the edge of the school website system v1. 3 upload vulnerability-vulnerability warning-the black bar safety net

Open the admin directory, and found there a upload. asp, this file is submitted and the documents submitted for judgment, which has such a sentence if Uprequest. form"fileErr"0 then select case Uprequest. form"fileErr" But I saw a half day also did not see it this fileErr read what it is, and...