Authored by Rahad Chowdhury, BugsBD Limited

PHPJabbers Appointment Scheduler version 3.0 suffers from multiple html injection vulnerabilities.

advisories | CVE-2023-48838

# Exploit Title: PHPJabbers Appointment Scheduler v3.0 - Multiple HTML Injection
# Date: 19/11/2023
# Exploit Author: BugsBD Limited
# Discover by: Rahad Chowdhury
# Vendor Homepage:
# Software Link:
# Version: v3.0
# Tested on: Windows 10, Windows 11, Linux
# CVE-2023-48838

PHPJabbers Appointment Scheduler v3.0 is vulnerable to Multiple HTML
Injection. HTML injection, also known as HTML code injection or
cross-site scripting (XSS), is a web security vulnerability that
allows an attacker to inject malicious code into a web page that is
then viewed by other users. This can lead to various attacks, such as
stealing sensitive information, session hijacking, defacement of
websites, or delivering malware to users.

Steps to Reproduce:
1. Login your panel.
2. Go to System Menu then click SMS Settings.
3. Then use any HTML Tag in "SMS API Key", "Default Country Code"
input field and Save.
4. You will see HTML code working here.

## Reproduce: