Authored by Rahad Chowdhury, BugsBD Limited

PHPJabbers Appointment Scheduler version 3.0 suffers from multiple persistent cross site scripting vulnerabilities.

advisories | CVE-2023-48839

# Exploit Title: PHPJabbers Appointment Scheduler v3.0 - Multiple Stored XSS
# 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-2023-48839

PHPJabbers Appointment Scheduler v3.0 is vulnerable to Multiple Stored
Cross-Site Scripting. Multiple Stored XSS is a type of security
vulnerability that occurs when an application or website allows an
attacker to inject malicious scripts into the content that is
permanently stored on the server. Unlike reflected XSS, where the
malicious script is embedded in a URL and executed immediately, stored
XSS involves the persistent storage of the malicious script on the
target server, waiting for unsuspecting users to access the
compromised content.

Steps to Reproduce:
1. Login your panel.
2. Vulnerable parameters are "name, plugin_sms_api_key,
plugin_sms_country_code, calendar_id, title, country name,
3. Go to System Menu then click SMS Settings.
4. Then use any XSS Payload in "SMS API Key", "Default Country Code"
input field and Save.
5. You will see popup.

## Reproduce: