PHPJabbers Time Slots Booking Calendar 4.0 HTML Injection

                # Exploit Title: PHPJabbers Time Slots Booking Calendar v4.0 - HTML Injection
# Date: 13/11/2023
# Exploit Author: BugsBD Limited
# Discover by: Rahad Chowdhury
# Vendor Homepage: https://www.phpjabbers.com/
# Software Link: https://www.phpjabbers.com/time-slots-booking-calendar/
# Version: v4.0
# Tested on: Windows 10, Windows 11, Linux
# CVE-2023-48827

Descriptions:
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. "name, plugin_sms_api_key, plugin_sms_country_code, calendar_id,
title, country name, customer_name" parameters are vulnerable to html
injection.
3. Go to System Menu then click SMS Settings.
4. Then use any HTML Tag in "SMS API Key", "Default Country Code"
input field and Save.
5. You will see HTML code working here.


## Reproduce:
[href](https://github.com/bugsbd/CVE/tree/main/2023/CVE-2023-48827)
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